A semi-naked prankster gave party girl Peaches Geldof a birthday surprise to remember when he jumped out of a gift box at her hotel.

The celeb was shocked when she went to unwrap an enticing looking prezzie, left outside her hotel room, only to see the near naked man burst through the wrapping paper.

A bemused Peaches exclaimed "What just happened there?" as Neg from Channel 4’s Balls of Steel sang a tuneless Happy Birthday and kissed her on the cheek.

The TV star had been dared to pull the prank by users of the online bragging website Bragster.com ... it was his own decision to strip off though.