I keep watching back the Latto performance from the BET awards and it seems like after Mariah initially comes out she sings 'where you at?' as Latto wasn't there rapping her bits (like, where did she go?) and then once she does arrive Mariah gestures to Latto like 'come on, sing your bit' and then the performance comes to an end. Weird but alas. Mariah still sounded amazing.