The ‘Toxic’ singer, who made a brief comeback show in a San Diego club, has already lost 15 pounds, burning 1,500 calories a day thanks to her dance regimen.

At her dance practice sessions in Millennium Dance Complex, the 25-year-old gets to choose her list of dancers, reports the Star.

Apart from the dance classes, Spears does 500-1000 crunches at one go to work on her six-pack.

Mother of two is also under strict diet and is also undergoing LipoDissolve treatment, which is a less invasive type of liposuction.

Spears’ efforts have already begun to show, as one of her fans, who attended her comeback gig, said that Spears looked really great, and that she has made a comeback to prove she can still give her best.

“I think she worked the stage, her body looked great. So it was good to see her finally come back and prove us all wrong,” the fan said.

Spears’ last major show in June, 2004 was her Onyx Hotel Tour in Ireland. (ANI)

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