Everyone loves sparks flying on the chatshow circus and the best chance of a meltdown tonight looks likely to come from the wayward Britney Spears as she drops by for a chinwag with Alan Carr.

Will he ask her opinion on twerking Miley Cyrus? Also making merry with Carr are Olympic hero Mo Farah and actor Joseph Gordon-Levitt, plus music from Jake Bugg, while Graham Norton has landed Paul McCartney, Natalie Portman, Chris Hemsworth, James Corden and Katy Perry.