Everyone remember's JoJo, right?! She had that big hit back in the early 2000's - "Leave (Get Out)" - that was basically every middle / high schooler's jam at the time. Well, who was growing up in the early 2000's? None other than Maren Morris. So, Maren called JoJo up on-stage with her over the weekend, and they sang JoJo's hit. The crowd, of course, loved it and sang almost every single word. But let's be honest, I'd be doing the same thing, and if I wasn't, it's probably just because I was dancing too hard and lost my breath.