News Next ET: Stars Who Don't Act Their Age Published 1:49 PM PDT, May 29, 2013 Cher! Madonna! J.Lo! ET breaks down the stars over 40 pushing the envelope on the red carpet. Plus, Valerie Bertinelli shares her advice for overweight moms, and we shine a spotlight on primetime's sexy new series, Mistresses.Pics: Fab and Over 40!Check your local listings.