London, March 17 - Singer Lily Allen was left dumbfounded when a fan pulled down his pants and exposed his bare behind.

Contactmusic.com reports that the incident took place when the singer was heading back to her hotel after a show in Manchester when a young guy approached her. And Allen got more than an autograph request from the man, when he pulled down his jeans and flashed his bottom at the singer.

The star's security ensured Allen wouldn't have to witness the sight for too long, covering her eyes with her Chanel handbag to save her any embarrassment.

IANS