Pop star Lily Allen risked upsetting rapper Jay Z during a festival slot in 2010 after leaving her pet pooch in his Vip backstage area.

The Smile hitmaker was on the bill at the Wireless Festival in London's Hyde Park alongside the 99 Problems icon in 2010, but she landed in trouble with the hip-hop mogul's security team after tying her poodle Mabel up in a special area set aside for him and his wife, Beyonce.

She reveals, "At Hyde Park a couple of years ago I tied Mabel up outside my dressing room before going on stage. Jay Z's bodyguard came over and was like, 'You have to move that dog!' Jay Z and Beyonce are about to arrive.

"Then Jay Z walked through and was like, 'The dog is Ok'. It was literally, 99 problems and the b***h ain't one."