But this year, the supermodel told PEOPLE last month, she's taking it easy.
"I don't know if I'm going to try to get ready for the show," Klum, 36, told PEOPLE before the arrival of her and husband Seal's daughter Lou on Sept. 9. "I'm going to totally play it by ear and see what happens."
The supermodel, who said she continued eating a clean diet light on carbs throughout her pregnancy, joins fellow Victoria's Secret angels Karolina Kurkova and Adriana Lima, who are also expecting, on the sidelines this year. The show takes place in New York City in November.
And though she has been known to turn it around quickly, even putting in twice daily workouts with trainer David Kirsch to lose the weight in 2005, Klum says there's no pressure to get ready this time around.
"[Victoria's Secret] knows that it's very close after [my due date], and they are not putting any pressure on me, and I'm not putting any pressure on myself!" she said. "It's not a lot of time [to get back in shape]. I think I'm going to take it a little bit easy."
"The most important thing is for our little girl to be happy and healthy," Klum added. "That's the main concern and we'll see what happens after that."
PeopleTV Archive: Heidi & Seal Take You Underneath the Sheets