Jason Derulo has ended Simon Cowell's all-star Haiti charity single's reign at the top of the UK charts.

The 20-year-old American was a new entry at number one with 'In My Head', while 'Everybody Hurts' fell to number nine.

The charity track, which featured the likes of Robbie Williams and Leona Lewis, enjoyed a three week run at the top.

Elsewhere on the single chart, Florence & The Machine and Dizzee Rascal's Brit awards collaboration 'You Got The Dirtee Love' was a non-mover at number two.

'Starry Eyed' by Ellie Goulding was a new entry at number four.

In the album chart, Lady Gaga's 'The Fame Monster' reclaimed the number one position for the second time in six months.

The record's return to the top coincides with the UK leg of the US singer's Monster Ball, which continues in Glasgow tonight (March 1).

(by Jason Gregory)