Katy Perry

The top 20 singles and albums for the week ended February 28, supplied by the Recording Industry Association, with last week's position in brackets.

SINGLES:

1 (1) If We Ever Meet Again - Timbaland feat. Katy Perry

2 (2) In My Head - Jason DeRulo

3 (14) Hey Soul Sister - Train

4 (10) Memories - David Guetta feat. Kid Cudi

5 (5) Cruel - Dane Rumble

6 (3) Black Box - Stan Walker

7 (9) You Got Me - J. Williams feat. Scribe

8 (33) Sun Goes Down - Nesian Mystik

9 (4) Whatya Want From Me? - Adam Lambert

10 (7) Art Of Love - Guy Sebastian feat. Jordin Sparks

11 (25) Rude Boy - Rihanna

12 (6) One Time - Justin Bieber

13 (31) Infinity 2008 - Guru Josh Project

14 (12) Bad Romance - Lady Gaga

15 (13) Just A Little Bit - Kids of 88

16 (36) Baby - Justin Bieber feat. Ludacris

17 (15) Fireflies - Owl City

18 (11) Replay - IYAZ

19 (18) Tik Tok - Ke$ha

20 (21) Blah Blah Blah - Ke$ha feat. 3Oh!3

ALBUMS:

1 (1) Holy Smoke - Gin

2 (2) Recollection - kd lang

3 (29) I Dreamed A Dream - Susan Boyle

4 (5) The Fame: Monster - Lady Gaga

5 (4) Introducing - Stan Walker

6 (3) Soldier Of Love - Sade

7 (7) Alvin And The Chipmunks: The Squeakquel OST - Alvin And The Chipmunks

8 (6) Glee: The Music Vol. 2 - Glee Cast

9 (8) Fearless: Deluxe Edition - Taylor Swift

10 (9) Hits - Seal

11 reentry Reunited: The 50th Anniversary Album - Cliff Richard And The Shadows

12 new American VI: Ain't No Grave - Johnny Cash

13 (11) Animal - Ke$ha

14 (13) Brand New Eyes - Paramore

15 (35) Scratch My Back - Peter Gabriel

16 (15) The E.N.D. - Black Eyed Peas

17 (12) The Resistance - Muse

18 (10) Heligoland - Massive Attack

19 (19) For Your Entertainment - Adam Lambert

20 reentry Young Love: Collectors Edition - J. Williams