The big heat bum-off: Louis Smith vs Rihanna

You've got this week's issue of heat magazine, right? It's out today and it's aces, so you've got no excuse not to...

So in this week's Manwatch, you'll be glad to see we've got a rather lovely picture of Louis Smith's naked bum. Why? Well it's because the Olympian and Strictly star![] has brought out his own range of hot tubs. And what better way to advertise these tubs than by getting nudie and having a right nice soak, right?

As we were staring lovingly at Louis' naked booty, we got to thinking (as Carrie Bradshaw would say... annoyingly...), whose butt is better - Louis' or Rihanna's? Because. let's be honest, we all got a good eyeful of that last week when Ri-Ri wore her jewelled, 100 per cent see-through dress to the CDFA Awards.

So what do you reckon - is Louis' butt better than Rihanna's?

GALLERY: Celebrity bums - can you guess who the celeb bum belongs to?