Fergie (Stacy Ferguson) signs her handbag collection 'Fergie for Kipling' at Macy's. Costa Mesa, California - 08.12.07

The Black Eyed Peas star was supporting The Police at a concert in Wellington on Thursday (17Jan08) when she hit the stage with the zip on her white trousers wide open.

It isn't the first time Fergie has been caught out onstage - at one Peas concert she was taken short in the middle of a song and had to relieve herself as she performed.

Source: WENN