Guess Which Super Hot Celebrity Dad Decorated the Christmas Tree in His Undies! (PHOTOS)

That’s right — it’s Mario Lopez’s tush you’re staring at! The X Factor host’s new wife, Courtney Mazza, tweeted out the adorable photo, saying, “My husband looks hot rockin his @RatedMOfficial with his little elf...#lovethem.” To which Mario responded, “I'm gonna get u back Mrs L!” Mario and Courtney were married on a Mexican beach on December 1. The couple’s little “elf,” 2-year-old daughter Gia, served as flower girl.