The 7 Hottest Celebs In Undies, Ever! You're Welcome. By Photo Editor Mary Rose Mielcarek EmailPrint It's National Underwear Day, and it's time to celebrate! To celebrate National Underwear Day (yes, that's a thing!), it's time to oogle some of the hottest bodies in the biz. What a glorious day this is! Chrissy Teigen weheartit.com Chrissy Teigen She's a "Sports Illustrated" cover girl, John Legend's wife, and a Taco Bell fan for life. Chrissy has a hot bod that seems to thrive on fast food, lucky girl! David Beckham weheartit.com David Beckham There are no words needed for this hot body. He seems to get better and better with age. God Bless him! Gisele Bundchen weheartit.com Gisele Bundchen Sigh, underwear never looked better. Mom of two, Gisele, kills the game with her hot body. Mark Wahlberg weheartit.com Mark Wahlberg Before he was Mark Wahlberg, we knew him as Marky Mark, and boy are we thankful for those days. This throwback to a hotter time is courtesy of those iconic 'Calvins'. Megan Fox weheartit.com Megan Fox Sexy, funny, and married to DAVID FROM 90210!? It's hard not to be jealous on so many levels. This gal truly has it all! Rihanna weheartit.com Rihanna She is beautiful with or without clothes, and (gulp) inspires us to hit the treadmill. Zac Efron weheartit.com Zac Efron Zac is hot in anything he wears, especially those Calvin's ! Chrissy Teigen She's a "Sports Illustrated" cover girl, John Legend's wife, and a Taco Bell fan for life. Chrissy has a hot bod that seems to thrive on fast food, lucky girl!