The old saying says what happens in Vegas, stays in Vegas, but that will not be the case on The Biggest Loser 2014 tonight, as the contestants will be facing the Penalty Box on Biggest Loser Season 16 and one of the teams will be heading to Las Vegas and it looks like one of the contestants will let their hair down for some fun. However, the weight gain would not stay in Vegas, so will it hurt their teams chances on The Biggest Loser Season 16? Check out a sneak peek at Week 8 below in our Biggest Loser 2014 spoilers!