Migos have jumped on Rico Love’s grown-and-sexy hit “They Don’t Know.” At first they sound like kids vying for attention, yapping in the background while the adults attempt conversation — Rico! They don’t know! Me and you! But then an auto-tuned Quavo breaks through with a heartfelt verse, and it becomes clear that the Versace boys reigned it in just enough to make this less-than-obvious remix work. And in the end, their still pretty boisterous presence works as a perfect foil to Rico’s so-smooth. Where’s Y.R.N. 2?