Britney's gruelling tour pays off as the pop star shows off chiselled stomach on stage

She may have filled his belly when she started her U.S. tour last month, but now Britney Spears has the body of a femme fatale.
When the superstar singer embarked on his tour in June, was out of shape and even looks a slight muffin top in tight outfits.
But now the singer 29 years old, is back in top form, which was evident on Friday when she came on stage to a sold out show at the Palace of Auburn Hills in Detroit, Michigan.