COLLAR POPPED!

The R&B star is hurt while rehearsing choreography...

R&B star USHER dislocated his shoulder during rehearsals for his forthcoming US tour, knocking him out of action for three months and putting the tour back until April 2002.

The star was due to begin his tour, supported by rising rapper Fabolous, on December 6. According to MTV, he injured his shoulder last week in Los Angeles rehearsing choreography that included backflips and handstands.

Usher‘s doctors advised surgery on the injury on Monday (November 12), and he is understood to still be in hospital recuperating. He should be released later this week.