Heidi Klum isn't concerned about packing on major pounds with her fourth pregnancy.
"Certain things you get used to," Klum told Usmagazine.com Sunday at the Elizabeth Glaser Pediatric AIDS Foundation's "A Time For Heroes" celebrity carnival. "You get used to all the changes of your body. It's not like I'm going, 'Oh my God!' I'm used to that part of it."
Klum says her children -- Leni, 5, Henry, 3, and Johan, 2 -- have already noticed the changes in her body. "They get it," said Klum, who renewed her vows with husband Seal in May on the Malibu shore. "They always rub my tummy.
"If I had a dress on, Leni would literally go all the way down under my dress to rub my tummy. And I go, 'My underwear is showing, thank you very much!'" Added Klum (who is expecting a baby girl): "You feel like a Buddha!"
As for getting back her post-baby bod, she's not concerned. "I'm not worried," said Klum, who famously sported a bikini at a 2005 Victoria's Secret fashion show two months after welcoming son Henry. "I know my body will go back again!"