Tom Cruise apparently made an unscheduled appearance at London's O2 arena during a Black Eyed Peas concert last night.

According to The Mirror, the movie star stepped into the limelight after will.i.am announced that he had written a new song for Cruise's movie Knight And Day.

Cruise, 47, who earlier this week dismissed rumours that he died in an accident in New Zealand, reportedly danced and sang along to 'I've Got A Feeling' during his unexpected appearance.