Music
Rex Features
The 24-year-old singer - real name Stefani Germanotta - climbs to the top spot with her debut single, 'Just Dance'.
Rock falls to second with 'All Summer Long', while Pink holds steady in third with 'So What'.
Meanwhile, Katy Perry climbs from 16 to seven with 'Hot N Cold', the follow-up to her international chart-topper 'I Kissed A Girl'.
The top ten singles in full (click where possible for our reviews):
1. (2) Lady GaGa: 'Just Dance'
2. (1) Kid Rock: 'All Summer Long'
3. (3) Pink: 'So What'
4. (4) Metro Station: 'Shake It'
5. (5) Jason Mraz: 'I'm Yours'
6. (7) Rihanna: 'Disturbia'
7. (16) Katy Perry: 'Hot N Cold'
8. (6) Pussycat Dolls: 'When I Grow Up'
9. (8) Katy Perry: 'I Kissed A Girl'
10. (9) The Veronicas: 'Take Me On The Floor'
Singles Reviews
Gym Class Heroes ft. Neon Hitch: 'Ass Back Home' reviewThe group are whipped into shape on their latest effort.
The Sound
Ones to watch: LawsonDigital Spy finds out more about the fast-rising group.
Music Interviews
McFly: 'We can't imagine splitting up'Digital Spy talks to Harry Judd about the band's new album.
Album Reviews
The Ting Tings: 'Sounds From Nowheresville' reviewThe duo overcomplicate matters on their second studio album.
