Coldplay rocker Chris Martin joined REM onstage in London last night for a surprise duet at a benefit show for fair trade.

The singer leapt onstage unnannounced and helped REM frontman MICHAEL STIPE perform Man On the Moon, to wild applause from the crowd at the Oxfam MAKE TRADE FAIR event at the Hammersmith Apollo.

The two superstar acts joined The Thrills, Jamelia, actress-turned-singer Minnie Driver and COMEDIAN RICKY GERVAIS at the bash, from which all profits will be donated to Oxfam.

15/09/2004 17:14