Singer pulled out of scheduled appearance at last minute this week
Following ups and downs (and take-offs and landings), tour is now complete
The rockers are lagging behind Rihanna's 'Unapologetic' in the midweek charts
Singer blames a cold for her lack of socialising
Singer also switches on London shopping centre's Christmas lights
Australian journalist streaks as singer refuses to speak to press and fans
A late start causes German fans to jeer
Rihanna releases latest album alongside Bjork, Tulisa and Led Zeppelin
Guests including P Diddy joined Rihanna last night (November 17) as she continued the European leg of the 777 tour