American rapper 50 CENT has reportedly fallen out with British pop star Robbie Williams after they clashed while staying at the same German hotel.

The Candy Shop hitmaker and the former boyband star both checked into the Ritz-Carlton hotel in Berlin this weekend (08-09OCT05), but trouble brewed when Williams' fans mistook 50 Cent's car for the former TAKE THAT singers' and greeted the rapper chanting, "Robbie, Robbie."

The situation escalated when Williams later complained to hotel management, demanding they curb the hip-hop wildman's late night antics.

A source tells British newspaper the Daily Mirror, "Robbie spent the evening with members of his band in the bar, just drinking tea and mineral water.

"He had rehearsals the next day and always takes them very seriously. He was in need of a good night's sleep.

"(50 Cent's) crew rolled back at 4am, kept the bar open and wanted to play rap music in the lobby.

"After the complaints from Robbie's people, hotel managers had to ask 50's security to take control. The guys looked unimpressed - some claimed they'd never heard of Robbie."