Just six weeks after having a baby, model Heidi Klum decided it was time to walk down the runway again.

Klum who was supposed to be acting as host of the Victoria’s Secret Fashion Show, drew screams from the crowd Thursday night when she made a surprise trip down the runway.

Showcasing a corset and full skirt Klum took to the runway, suprising everyong.

“I figure why not? I embrace that I have more curves right now. I’m definitely one of the heaviest of the bunch of the 30 girls in the show. And I still have 20 lbs. to go,” she admits. “But why not? I like my outfit. I like the way it looks on me.”

Klum who gave birth to daughter Lou Sulola six weeks ago now and the proud mother of 4 children  with husband Seal, said she was happy the pressure to bare all is finally over.

“You definitely have less pressure hosting, when you don’t shake your booty in front of millions of people around the world,” she said laughing.

“There’s no master plan, but I have a trainer in L.A. who comes to my house,” the model and Project Runway host told PEOPLE. “She’s helping me so I don’t overdo it. I’ve been walking on the treadmill. Walking up and down the driveway. She has a medicine ball so she showed me things on there. You can’t do too much too early.”

As for her diet, “I’m not someone who eats salad and chicken,” explains Heidi, who says her biggest indulgence, a liter of milk a day, helped her gain 45 lbs. with her fourth pregnancy.

“I have a lot of heads around the table and if there’s not variety they get bored. I mean sometimes I have two to three things to serve and my daughter will be like, ‘That’s it, Mommy?’ So it’s fish one day, goulash the next day, spaghetti Bolognese, then schnitzel. I cook a lot.”

Heidi Klum hits the runway at fashion show last week