Eamon's debut album is released in the UK on Monday

The 20-year-old New York newcomer's angry ballad about an ex-girlfriend beat Eminem's group D12 to the top.

Eamon's song combines hip-hop and doo-wop and he describes it "a soulful street sound that takes the listener on a wild lyrical ride".

D12's My Band was a new entry at number two, while Finnish rock band The Rasmus remained at number three.

UK TOP FIVE SINGLES 1. Eamon - I Don't Want You Back 2. D12 - My Band 3. The Rasmus - In the Shadows 4. Anastacia - Left Outside Alone 5. Usher feat Lil' Jon - Yeah

Last week's number one, Five Colours in Her Hair by boy band McFly, slid to number six, while The Libertines singer Pete Doherty's single For Lovers entered at seven.

Eamon, who began performing in his father's doo-wop band aged nine, said he wrote his single after finding out his girlfriend was cheating on him.

Radio stations have been playing an edited version of the song, which has also been a big hit in the US.

In the album chart, 1980s rockers Guns 'n' Roses knocked singer Anastacia off the top of the chart with their Greatest Hits.