But recently when she had Niall Horan appear on the show, she decided to tailor the fear factor to the One Direction star by recruiting another One Direction star: Harry Styles (a lookalike, anyway).
While Niall was on the couch chatting away to Ellen, someone dressed as his bandmate jumped out of a box and frightened the poor little Irishman.
Check out the video below:
Poor Neil never saw it coming...