Spears’ trainer, Manny Bujold has revealed how Britney Spears has lost 12 pounds in the past month.

According to her new trainer, Britney Spears, who was a size 8 after losing 26 pounds postbaby, has lost another 12 pounds in little more than a month.

“She’s very much leaned-out,” says Bujold, adding that Spears actually likes crunches.

“She works extremely hard,” says Bujold. Two to four days each week, at Spears’ home in Beverly Hills, the trainer works two hours with the 5-foot-4 Britney.

She does lunges and squats, as well as kickboxing and running on the treadmill — to Prince and Madonna tunes. “She’s really good about not groaning,” says the trainer, who admits he can be “mean.”

Spears also torches the calories (up to 1,500 an hour) with jazz and hip-hop dance classes at North Hollywood’s Millennium Dance Complex. “Her body was in phenomenal shape,” says instructor Darrien Henning (commenting on her recent visit).

As for Britney Spears’ diet, she has swapped the Cheetos for healthy sushi (she’s a fan of the California rolls at L.A.’s SHU sushi) and eats six mini-meals a day.

“I think she’s excited to get where she wants to be,” Bujold says of his client. A staffer at L.A.’s Epitome salon, where Spears goes tanning, has an idea where that might be: “I heard her say she wants to look good in a bikini!”

“She likes the Pilates-style body: lean muscles, very toned,� says Bujold. [via]