Look, I know we as a society are just getting over the great Is It Gold Or Is It Blue Dress Debate. But when you look at the pictures below, taken at Meghan Trainor's sold-out House of Blues show last night, you will note that her skirt is gold in one shot, blue in the others. OMG. We're going to leave it to you to decide if this is zeitgeisty optical magic on Trainor's part, or a routine costume change. It will come as no surprise that the 21-year-old closed the show with "All About that Bass," complete with giant "BASS" graphics and a jazzy dude playing a standup bass, that we were indeed all about. That was not the only No. 1 hit the rising pop star served up. She also covered "Uptown Funk" and "Stay with Me," making her tour a rolling Billboard smorgasbord. Also: CONFETTI!! Check out pics from the gig.