Wii Fit managed to hold on to its number one spot, but dropped in copies sold. Selling 777,000 in January, it fell to 644,000 in February. The big winner is Capcom's Street Fighter IV, which claimed the number two and three spots for the Xbox 360 (446,000 copies) and PS3 (403,000) respectively for a total of 849,000. It's also one of the smallest margins between the Xbox and PS3 versions of a multiplatform game I recall seeing.
1. Wii Fit (Wii) - 644,000
2. Street Fighter IV (360) - 446,000
3. Street Fighter IV (PS3) - 403,000
4. Wii Play (Wii) - 386,000
5. Killzone 2 (PS3) - 323,000
6. Mario Kart Wii (Wii) - 263,000
7. Call of Duty: World at War (360) - 193,000
8. Mario Kart DS (DS) - 145,000
9. New Super Mario Bros. (DS) - 144,000
10. Guitar Hero World Tour (Wii) - 136,000
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1. Wii Fit (Wii) - 644,000
2. Street Fighter IV (360) - 446,000
3. Street Fighter IV (PS3) - 403,000
4. Wii Play (Wii) - 386,000
5. Killzone 2 (PS3) - 323,000
6. Mario Kart Wii (Wii) - 263,000
7. Call of Duty: World at War (360) - 193,000
8. Mario Kart DS (DS) - 145,000
9. New Super Mario Bros. (DS) - 144,000
10. Guitar Hero World Tour (Wii) - 136,000
source