OK! Exclusive: Britney Spears Drops 12 Pounds After Unflattering Iggy Azalea Music Video Photos Surfaced

Watch: Britney Spears Slams Iggy Azalea After Being Blamed For Their Song's Flop

Remember those ridiculously unflattering photos of Britney Spears and her tummy when she and Iggy Azalea were filming their music video? Well, Brit saw them too, and according to our insiders, she was “horrified” and used it as motivation to get back in shape!

The source said that Brit is looking hotter than ever since “Pretty Girls” and the paparazzi photos showing her not-so-toned stomach came out in April thanks to a diligently workout regimen and a carb-free diet.

“It was a big wake-up call and she’s been religiously getting back into shape,” the insider said. OKMagazine.com first reported that Brit went on a crash diet back in April after the unretouched photos emerged, complaining that she felt the “biggest she’s ever been.” According to the source, "she was in tears over how much she’d let herself go."

Spears has amped up her ab workout in recent months with crunches to get rid of rolls and has even banned junk food from her now infamous shopping lists.

“She’ll always have bad memories of that video because of the unflattering pap shots during filming,” the source said. “There was no way she was going to promote it after that – she was too mortified.”