Lily Allen surprised by Lindsay

LILY ALLEN was taken by surprise after Lindsay Lohan joined her on stage in Hollywood.

The singer was finishing a cover of Britney Spears's Womanizer when the actress walked onto the stage at the gig at The Wiltern.

Lohan, 22, hugged Allen, 23, before singing into the microphone and dancing until the end of the song.

Speaking to US chat show host Jimmy Kimmel, Allen, who is on a tour of the States, said: "That was a complete surprise."