Music
Her debut single 'Just Dance' climbs to number one after 22 weeks on the Billboard Hot 100, forcing Beyoncé's 'Single Ladies' into second place.
The 22-year-old pop singer - real name Stefani Germanotta - is also on course to top the UK singles chart on Sunday.
T.I and Rihanna remain at three with 'Live Your Life', while country singer Taylor Swift climbs to four with 'Love Story'.
Outside of the top ten, Pussycat Dolls jump from 21 to 19 with 'I Hate This Part', while Pink rises from 35 to 32 with 'Sober'.
The top ten singles in full (click where possible for our reviews):
1. (2) Lady GaGa ft. Colby O'Donis: 'Just Dance'
2. (1) Beyoncé: 'Single Ladies (Put A Ring On It)'
3. (3) T.I. ft. Rihanna: 'Live Your Life'
4. (5) Taylor Swift: 'Love Story'
5. (4) Kanye West: 'Heartless'
6. (6) Katy Perry: 'Hot N Cold'
7. (12) Jason Mraz: 'I'm Yours'
8. (7) Britney Spears: 'Womanizer'
9. (15) Kevin Rudolf ft. Lil Wayne: 'Let It Rock'
10. (8) Kanye West: 'Love Lockdown'
Singles Reviews
DJ Fresh ft. Rita Ora: 'Hot Right Now' reviewThe DJ's latest effort lacks the magic of its predecessor.
The Sound
Playlist: 10 tracks you need to hearIncluding Katy Perry, Will Young and Nicki Minaj.
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.
