Zumba Fitness has been there or thereabouts since it launched, but this week it's leapfrogged Portal 2 and Mortal Kombat to become the best selling game in the UK last week.
Elsewhere, Operation Flashpoint: Red River feel a few places, which saw Black Ops, LEGO Star Wars III and FIFA 11 move up slightly. The rest of the Top 10 was pretty much the same as before.
Sniper: Ghost Warrior saw a resurgence in sales, re-entering in 15th, while Virtua Tennis 4 and Red Dead Redemption also jumped up a bit. Homefront, however, fell down from 9th to 17th.