Mark Cuban joined his Shark Tank costar Kevin O'Leary on stage at the Billboard Music Awards in Las Vegas on Sunday night to introduce Florida Georgia Line's musical performance. The duo took the opportunity to make light of Solange Knowles and Jay Z's post-Met Gala elevator fight. Mark started by saying, "We've just spent $3.2 billion to buy a hot new company called Beat Downz by Solange," while Kevin followed it up with the quip, "That was a great, great elevator pitch." The joke didn't go over too well, and while Mark is still hung up on the drama, Beyoncé, Jay Z, and Solange have all clearly moved on, since Jay Z and Beyoncé released a statement  last week saying that they've "moved forward as a united family." Solange has also since stepped out smiling  in New Orleans with her boyfriend, Alan Ferguson.
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