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Pink opens up about losing 55 pounds post pregnancy

Pink, who welcomed her daughter Willow a little over a year ago, opened up to Shape magazine about losing the 55 pounds she gained during pregnancy.

The 33-year-old singer covers the fitness magazine's November issue flashing her rock-hard abs, something she gave up during pregnancy.

"I ate a lot of cheesecake during my pregnancy," Pink told Shape. "Also anything sour - Sour Skittles, Sour Patch Kids, key lime pie..."

While she didn't get to the gym immediately after giving birth, the singer ended up working out with Jillian Michaels and Jeannette Jenkins, according the magazine.

"They both kicked my butt more than any other person I've ever worked out with," Pink told the magazine.

Now, she says she's in the best shape of her life.