Diana Ross' daughter is coming out and she wants Las Vegas to know! Tracee Ellis Ross surprised fans Sunday afternoon when she took to Facebook and shared a video from a recent concert with her mom. As it turns out, this show wasn't just your ordinary night in Las Vegas. In actuality, Dianna Ross asked Tracee to get on stage and sing alongside her. So what was the end result? Pure mother-daughter magic! Between hugs, laughs and even a few tears, the duo got people on their feet with their rendition of "Lady Sings the Blues" inside The Venetian Theater.