Stars sweat it out By Spencer Bergen Published April 28, 2017, 5:05 p.m. ET 1 of 13 Jack Nicholson Pacific Coast News 2 of 13 Rick Fox Pacific Coast News 3 of 13 Kris Jenner and Kim Kardashian Getty Images 4 of 13 Jude Law Getty Images 5 of 13 Gerard Butler Getty Images 6 of 13 Angela Bassett Getty Images 7 of 13 Vin Diesel Getty Images 8 of 13 Missi Pyle Getty Images 9 of 13 Woody Allen Splash News 10 of 13 Richard Branson Splash News 11 of 13 Jennifer Lopez Splash News 12 of 13 David Duchovny INF Photo 13 of 13 Adawale Akinnuoye-Agbaje Splash News Up Next J.Lo rocks two barely-there dresses and more star snaps