Lohan surprises Allen on Hollywood stage

Lindsay Lohan surprised Lily Allen when she joined the singer during a Hollywood gig.

Lohan went on the stage at The Wiltern last week as Allen was finishing her cover of Britney Spears's 'Womanizer'.

The Mean Girls star was embraced by Allen before attempting to sing a line into the microphone and proceeding to dance until the end of the song.

Allen later told Jimmy Kimmel Live!: "That was a complete surprise."