Britney Spears has reportedly turned down the chance to make a second guest appearance on Madonna's world tour - because of family commitments.

Fans didn't have to wait long for the much-hyped Britney Spears and Madonna collaboration at the singer's Dodgers Stadium show in Los Angeles on Thursday night - the stars teamed up just three songs in.

The Rolling Stones have their sights set on recording the biggest-grossing world tour in history after announcing autumn dates in America.