Don't Stop Me Now has been raising money for Sport Relief

The Sport Relief cover version of Queen's 1979 hit toppled Lily Allen's Smile, which fell to fourth place after two weeks at number one.

Rising from last week's 16 to number two was Unfaithful by Rihanna. She nudged Shakira's Hips Don't Lie into third spot.

You Give Me Something by James Morrison climbed 22 places to fifth.

UK TOP FIVE SINGLES 1. McFly - Don't Stop Me Now 2. Rihanna - Unfaithful 3. Shakira - Hips Don't Lie 4. Lily Allen - Smile 5. James Morrison - You Give Me Something Source: Official UK Charts Company

The Rogue Traders' - fronted by Neighbour's soap actress Natalie Bassingthwaighte - fell three to six with Voodoo Child, while Nelly Furtado's catchy Maneater also slid three to seventh.

Sandi Thom's I Wish I was a Punk Rocker fell three to this week's number eight, while Last Request by Paolo Nutini dropped to number nine.

Gnarles Barkley rounded out the top 10 by rising 13 places with Smiley Faces.

Allen and Nutini were both new entries in the album charts - at two and three respectively - with Alright Still and These Streets.

Razorlight managed to grab first place with their self-titled album Razorlight.

Last week's number one - Black Holes & Revelations by Muse - fell to fifth, while the Kooks with Inside In/Inside Out were down two places at four.