Heidi Klum has given up lingerie modeling.

The 40-year-old supermodel says she would no longer feel "comfortable" on a catwalk wearing only a bra and briefs: "I wouldn't model with my underwear down the runway anymore. I think I would find it a little uncomfortable, maybe. I still do photoshoots for [magazine] covers and different things or advertising stuff."

The mother of four - who split from her husband, singer Seal, in 2012 and his now in a relationship with her former bodyguard Martin Kristen - also said she is happy to get older and embrace the lines of age rather than have surgery. "I wouldn't say that I love [my crow's feet], but that's just the way it happens, right? We get wrinkles from smiling. I've never had any [cosmetic procedures]. I've been too scared, to be honest with you. I'm scared that all of a sudden you're changing too much, your face starts changing, I don't know. I would have a hard time looking in the mirror and seeing something that I'm not used to seeing. I'd be afraid," she said.