Watch Madonna celebrate Britney Spears’ birthday with weird cover

The star was performing at a benefit event for Malawi

Madonna marked Britney Spears’ birthday with a weird cover while performing in Miami.

The pop star was hosting a charity benefit event raising money for Malawi on December 2. The night raised $7.5 million (£5.9m) and also featured the likes of Ariana Grande and Sean Penn.

Madonna chose to cover Spears’ 2003 single ‘Toxic’, but instead of performing a faithful version of the song made some changes to the track. Dressed in a tiny top hat, pink top with oversized tulle collar and sleeves and black-and-white striped leggings, she sung a slowed down rendition over eerie backing music.

Watch footage from the performance below, via MTV News.

Recently, Madonna responded to reports that her son was arrested in September for possession of cannabis.

Reports surfaced last month (November 23), alleging that Rocco, 16, was detained in London on September 28 after police found cannabis in his rucksack.

The singer released a statement to The Associated Press, which seemingly confirmed the reports while calling the situation a “family matter”.

“I love my son very much. I will do whatever I can to give him the support that he needs, and I ask that you respect our privacy at this time,” Madonna said in the statement.

A Scotland Yard spokesman has said: “A 16-year-old has been arrested for possession of cannabis. He was bailed and dealt with by Camden Borough’s Youth Offending Team.”

Rocco Ritchie is the singer’s son with ex-husband, director Guy Ritchie. The couple divorced in 2008.