Pop star Lily Allen apparently exposed one of her breasts during a recording of her BBC Three chat show Lily Allen and Friends. The Smile star was interviewing PHEONIX NIGHTS star Paddy McGuinness when she is said to have exposed her right nipple and started to 'play with it'.

"Lily and Paddy were both quite lively. They were sitting on the sofa and she pulled out her right boob. Everyone in the audience was doing a double take as Lily sat there with her breast hanging out." A source told Digital Spy.

The source added that she didn't put it away for a further three minutes.

Allen's controversial chat show has just had a second season commissioned by the BBC. It returns to Three later in the year.