Music
According to Contactmusic, the 'LoveGame' singer sang John Lennon's 'Imagine' on the eve of a gay rights march in Washington.
GaGa previously posted a message online urging her fans to attend the event, before taking part in the demonstration outside the White House.
Obama told the audience of his future reform plans to allow homosexuals to join the US military, after joking: "I'm honoured to be opening for Lady GaGa tonight."
Singles Reviews
Stooshe feat. Travie McCoy: 'Love Me' reviewThe trio breathe life into the girl band genre on their debut single.
The Sound
Big Time Rush's Valentine's Day playlistWe ask Big Time Rush for their all-time favourite love songs.
Music Interviews
Cher Lloyd: 'LA Reid loves scrambled eggs'Digital Spy finds out what the singer has been up to in America.
Album Reviews
The Ting Tings: 'Sounds From Nowheresville' reviewThe duo overcomplicate matters on their second studio album.
