Nick Jonas covers the December issue of Men's Fitness US, and his ripped muscles will make you think that Christmas has come early this year. The "Levels" singer poses in a black vest top for the health magazine, revealing his rock-hard abs while seductively pulling his jeans down and showing off his "Mercy" tattoo on his forearm. The accompanying headlines also perfectly reflect what comes to mind when looking at the cover ("Amazing Sex-Tonight!" is our favourite). Of course, this isn't the first time Nick has confirmed he's the furthest thing from shy. Earlier this year, he stripped down to his underwear on an episode of Running Wild With Bear Grylls. He also told Jimmy Fallon a hilarious story about the time he accidentally got a boner at an award show. We hope his New Year's resolution is to keep sharing, because we're loving it.