Britney Spears Is Abs-olutely Fabulous

The singer shows off her fit physique while rehearsing for her upcoming tour

In case there happens to be someone who still needs proof that the old Britney Spears has returned, look no further than the pop star's exposed midriff, seen here in a shot just posted to her Website.

The pic was taken as the "Womanizer" songstress prepares for her upcoming world tour, The Circus Starring Britney Spears, which kicks off March 3 in New Orleans.

Forget milk. Clearly a comeback does a body good!