Heidi Klum's Aging Secret: Gain Weight! Cosmetic surgery is nothing compared to the power of a few pounds By Evann Gastaldo, Newser Staff Posted Nov 19, 2010 10:57 AM CST 9 comments Comments Heidi Klum arrives at the premiere of "The Back-up Plan" in Los Angeles on Wednesday, April 21, 2010. (AP Photo/Matt Sayles) (Newser) – Forget Botox: If you want to look young as you grow older, just gain a few pounds, according to Heidi Klum. "The ultimate beauty secret for a woman getting older is, Don't be too thin!" she tells Self. "When you are just muscle, you end up being gaunt in the face, and that makes you look older by five or 10 years." She also recommends—especially for new moms—lots of sleep and perhaps a spray tan to stay looking fresh. For more, including how she feels about her own wrinkles, click here.