505 Games' Zumba Fitness is showing amazing legs, regaining the UK video games chart No.1 from Valve's Portal 2.

Zumba recorded an impressive three per cent drop off week on week, which allowed the fitness title to jump ahead of Portal 2 which dropped a not unusual 43 per cent. Mortal Kombat is down 53 per cent to No.3, while Call of Duty: Black Ops fell only two per cent to climb one place to fourth. LucasArts' LEGO Star Wars III is at No.5.

Codemasters' Operation Flashpoint: Red River slips three places to No.7, Wii Fit Plus is at No.8, Pokemon Black is back inside the Top 10 at No.9 and Just Dance 2 closes out the Top 10.

The week's only new release of note was City Interactive's Sniper: Ghost Warrior. The game's debut on PS3 helped the multi-format surprise to No.15 with a 457 per cent sales increase week on week.

Leisure software charts compiled by Chart Track, (C)2011 UKIE Ltd (All Prices) Week 18, 2011

1. ZUMBA FITNESS

2. PORTAL 2

3. MORTAL KOMBAT

4. CALL OF DUTY: BLACK OPS

5. LEGO STAR WARS III: THE CLONE WARS

6. FIFA 11

7. OPERATION FLASHPOINT: RED RIVER

8. WII FIT PLUS

9. POKEMON BLACK VERSION

10. JUST DANCE 2

11. MICHAEL JACKSON: THE EXPERIENCE

12. POKEMON WHITE VERSION

13. RED DEAD REDEMPTION

14. VIRTUA TENNIS 4

15. SNIPER: GHOST WARRIOR

16. CRYSIS 2

17. HOMEFRONT

18. LEGO HARRY POTTER: YEARS 1-4

19. SHIFT 2: UNLEASHED

20. KINECT SPORTS

Next week's major releases include Bethesda's Brink and Disney Interactive Entertainment's LEGO Pirates of the Caribbean. We're still unsure exactly how consumers will react to the multiplayer focussed Brink, but it's certainly got something unique going for it.

The hype building for the new Pirates movie should, however, help LEGO Pirates of the Caribbean get off to a very strong start.