The best-selling tracks of 2010 (as of Dec 19th) 40. Lady Gaga - 'Alejandro'. The third single from her 2009 EP 'The Fame Monster', it charted at Number 75 in the UK Singles Chart prior to its official release, due to digital sales. The song eventually peaked at Number Seven in the UK.
39. Example - 'Kickstarts'. The third single from his second album, 'Won't Go Quietly', debuted in the UK Singles Chart at Number Three and at Number One on the UK Dance Chart and UK Indie Chart - his second consecutive chart-topping track on both of the charts.
38. B.o.B. feat. Bruno Mars - 'Nothin' On You'. Debuting at Number One in the UK Singles Chart with 85,333 sales, this collaboration was the first single from B.o.B.'s debut album, 'B.o.B Presents: The Adventures of Bobby Ray'. It was nominated for three Grammys, including Record of the Year.
37. The Wanted - 'All Time Low'. The band's debut single peaked at Number One in the UK Singles Chart. Despite expectations for their success to be short-lived, the song remained in the Top 40 for 16 consecutive weeks.
36. Ellie Goulding - 'Starry Eyed'. Taken from her debut album, 'Lights', it peaked at Number Four in the UK Singles Chart. This track was included on the film soundtrack for 'Kick-Ass', as well as on an April 2010 episode of 'Hollyoaks'.
35. K'naan - 'Wavin' Flag'. The third single from his album 'Troubadour' entered the UK Chart at Number 16, but it reached Number One on the UK R&B Chart. This song was used as Coca-Cola's promotional anthem for the 2010 FIFA World Cup. A different version of the song, featuring will.i.am and David Guetta, appears on the soundtrack for video games 'NBA 2K10' and '2010 FIFA World Cup South Africa'.
34. Scouting For Girls - 'This Ain't A Love Song'. Spending two weeks at the top of the UK Singles Chart, this song, from the band's second studio album, 'Everybody Wants to Be on TV', was their first-ever Number One single.
33. Jason Derulo - 'In My Head'. The second single from his self-titled debut album, it debuted at Number One on the UK Singles Chart. There's also an official remix of the song, featuring Nicki Minaj. It's also been covered by Mayday Parade and by Korean singer Brian Joo.
32. Sidney Samson feat. Wizard Sleeve - 'Riverside (Let's Go!)'. This one comes from Dutch DJ Sidney Samson. It samples a clip of Tupac Shakur shouting "Riverside, motherfucker!", from the film 'Juice'. The mix with Wizard Sleeve reached Number One on the UK iTunes chart and Number Two in the UK Singles Chart.
31. Timbaland feat. Katy Perry - 'If We Ever Meet Again'. Taken from Timbaland's third studio album 'Shock Value II', the song entered the UK Singles Chart at Number 17, then peaked at Number Three the following week.
30. Tinie Tempah feat. Eric Turner - 'Written In The Stars'. Another Number One debuting song, this was Tinie Tempah's second chart-topper in the UK and it sold more than 115,000 copies in its first week of release.
29. Eminem - 'Not Afraid'. The first single from his seventh studio album, 'Recovery', peaked at Number Five in the UK Singles Chart. It also received two Grammy nominations for Best Rap Solo Performance and Best Rap Song.
28. Katy Perry - 'Teenage Dream'. The second single from her third album of the same title, it peaked in the UK at Number Two and was nominated for a Grammy for Best Female Pop Vocal Performance. In its first week, the song sold over 86,000 copies in the UK.
27. Katy Perry - 'Firework'. The third single from 'Teenage Dream', it peaked at Number Three in the UK and was certified Silver for selling over 200,000 copies. Perry said: "I also don't want to be cheesy...It's a fine line, and I think 'Firework'...would be like the opus or my one song — if I had to pick a song to play — 'cause it has a great beat. But it also has a fantastic message."
26. Eliza Doolittle - 'Pack Up'. The second single from her self-titled debut album, it entered the UK Singles Chart at Number 12 and peaked at Number Five, becoming her first Top Five song. The track has been certified Silver for more than 200,000 sales in the UK.
25. Lady Gaga - 'Bad Romance'. Kicking off its release at Number 14 in the UK Singles Chart, the lead single from EP 'The Fame Monster' eventually made it to Number One, becoming her third chart-topping single in the UK. She made chart history by having the most Number One songs in a single year by a female artist.
24. 3OH!3 feat. Katy Perry - 'Starstrukk'. The week of the Christmas Chart 2009, this song came in at Number Five in the UK, eventually climbing to Number Three in January 2010. The band's most successfully ranking single in the UK, it's been certified Gold for more than 400,000 sales.
23. Travie McCoy feat. Bruno Mars - 'Billionaire'. The debut solo track from the Gym Class Heroes man peaked at Number Three on the UK Singles Chart. Brazilian singer Claudia Leitte released a version of the song, called 'Famo$a', where she sings Bruno's parts in Portuguese.
22. Journey - 'Don't Stop Believin''. While it's great to see Journey's 1981 hit back in the picture, the 'Glee' version of the song one-upped it, coming in at 21. The song was the 84th most downloaded song of 2009 on iTunes and has surpassed 3 million paid downloads.
21. Glee Cast - 'Don't Stop Believin''. Television show 'Glee' showcased a cover of Journey's song, which peaked at Number Two on the UK Singles Chart. In the US, it sold 177,000 downloads in its first week, charting higher than the original version.
20. Matt Cardle - 'When We Collide'. Despite efforts to knock the X-Factor winner out the the coveted Christmas Number One spot, this year's winner still managed to win the title. A cover of Biffy Clyro's 'Many of Horror', renamed 'When We Collide', was released as his debut single, and sold 439,000 copies in its first week.
19. Jason Derulo - 'Ridin' Solo'. Making another appearance in this list, Jason Derulo's third single became his third consecutive top three hit in the UK Singles Chart and his third consecutive Number One in the UK R&B Chart. An earlier version of the song sampled The Verve's 'Bittersweet Symphony', but it wasn't cleared and was removed from the song.
18. Flo Rida feat. David Guetta - 'Club Can't Handle Me'. Debuting at Number One on the UK Singles Chart, this song appeared on the 'Step Up 3D' soundtrack, and is also expected to appear on Flo Rida's third album, 'The Only One'. The song also topped the UK Dance Chart.
17. Taio Cruz - 'Dynamite'. Another track debuting at Number One in the UK, this was the first single released from 'The Rockstarr Collection' (a compilation of his best hits from his two albums). The song also topped the UK R&B Chart.
16. Cee Lo Green - 'Forget You'. Staying at the top of the UK Singles Chart for two weeks, the censored version of Mr. Green's song is from his third studio album, 'The Lady Killer'. The video became a viral Internet sensation, receiving more than two million views within its first week. He has received Grammy nominations for both Record of the Year and Song of the Year.
15. Iyaz - 'Replay'. The first single from Iyaz's debut album 'Replay', it spent two weeks at the top of the UK Singles Chart and sold more than 106,000 copies in its first week.
14. Plan B - 'She Said'. The second single from Plan B's album 'The Defamation of Strickland Banks', it topped the UK R&B Chart, peaked at Number Three on the UK Singles Chart, and also topped the NME Chart.
13. Lady Gaga feat. Beyoncé - 'Telephone'. Taking the top spot of the UK Singles Chart for two weeks and becoming her fourth UK Number One single, the song was nominated for a Grammy for Best Pop Collaboration with Vocals. Gaga supposedly originally co-wrote the song for Britney Spears, but it was rejected by her label, so she went ahead and released it herself.
12. Rihanna - 'Rude Boy'. The second international single released from her album 'Rated R', this song topped the UK R&B Chart and peaked at Number Two on the UK Singles Chart. And if you were wondering, "Rude Boy" is an old Jamaican slang term for "lawless males".
11. Alicia Keys - 'Empire State Of Mind (Part II) Broken Down'. A follow-up song to her collaboration with Jay-Z, 'Empire State Of Mind', it reached Number Four on the UK Singles Chart before it was officially released, due to digital downloads. Spending 26 consecutive weeks in the Top 40, this song became her most successful UK single.
10. Tinie Tempah - 'Pass Out'. The rapper's debut single was initially only released as a UK digital download. It debuted at Number One on both the UK Singles Chart and UK R&B Chart, selling more than 92,000 copies. This song also stayed on the top of the NME Chart for several weeks running.
9. Rihanna - 'Only Girl (In The World)'. Spending two weeks at Number One on the UK Singles Chart, Rihanna received one of the biggest first-week singles of 2010 with more than 126,000 copies sold. This song has also received a Grammy nomination in the Best Dance Recording category.
8. Helping Haiti - 'Everybody Hurts'. A collaborative release to raise money for the victims of the 2010 Haiti earthquake, Simon Cowell gathered the likes of Leona Lewis, Rod Stewart, Cheryl Cole, JLS and Robbie Williams to record the song. R.E.M. waived all royalties, and the song stayed at Number One in the UK for two weeks, with the biggest first week sales of any charity track this century.
7. Yolanda Be Cool vs. DCUP - 'We Speak No Americano'. Peaking at Number One in the UK, this song samples the 1956 song 'Tu vuò fà l'americano' by Renato Carosone, written by Carosone and Nicola Salerno. It won the 2010 ARIA award (in Australia) for Best Dance Release.
6. Katy Perry feat. Snoop Dogg - 'California Gurls'. Spending two weeks at the top of the UK Singles Chart, this collab was Perry's second Number One single in the UK, selling 123,607 copies in its first week. The title was initially 'California Girls', but was altered when Big Star's Alex Chilton died, as an homage to their song 'September Gurls'.
5. B.o.B. feat. Hayley Williams - 'Airplanes'. Though the song debuted at Number 23 in the UK, it moved up to Number Two within five weeks, and then reached Number One, becoming B.o.B.'s second chart-topper in the UK. A sequel to the song, called 'Airplanes, Part II', was recorded with Eminem (as well as Hayley Williams), and was nominated for a Grammy for Best Pop Collaboration With Vocals.
4. Owl City - 'Fireflies'. The debut single from album 'Ocean Eyes', featuring vocals from Relient K's vocalist Matt Thiessen, spent three weeks at the top of the UK Singles Chart (although it debuted at Number 50). It's seen quite a few covers, including Cheryl Cole's version on BBC Radio 1 Live Lounge, American Idol and X Factor in Finland.
3. Usher feat. will.i.am - 'OMG'. This song reached Number One on both the UK Singles Chart and UK R&B Chart. In the US, Usher became the first artist of the decade to receive three Number One singles in three consecutive decades, and the fourth artist ever to do so.
2. Bruno Mars - 'Just The Way You Are'. This lead single from his debut album, 'Doo-Wops & Hooligans', became his second Number One UK single. Mars received a Grammy nomination for Best Male Pop Vocal Performance for this song. This season's X Factor winner recorded a version of this song to release as a B-Side to his debut single, 'When We Collide'.
1. Eminem feat. Rihanna - 'Love The Way You Lie'. This proves that Eminem and Rihanna make a winning combination, taking the title of best-selling single of 2010. Surprisingly, it never reached Number One of the UK Singles Chart, peaking at Number Two. It did, however, top the UK R&B Chart.