Heidi Klum has revealed the source of all those racy selfies she posts on Twitter and Instagram -- her mom.

The America's Next Top Model hostess has recently posted images of herself hugging a palm tree in Bora Bora, sunbathing topless with some sand and shells arranged on her belly in the form of a smiley face, and pulling down her bikini bottoms enough to reveal a nasty sunburn.

"You will be surprised when you hear that my mom takes most of the photos," Klum told Access Hollywood on Wednesday. "Yeah, my mom and dad. They were on vacation. Yes, so my mom can take some good photos."

The German model is actually quite relaxed about showing skin because of her European roots.

"And I'm European," she adds. "I don't like wearing tops. And I don't like tan lines."