Brad Paisley, who collaborated with Demi on a song, wrote:
New mom Cardi B sent love:
Joe Jonas:
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Meghan Trainor:
Adam Lambert:
Lily Allen:
Emmy Rossum:
Clean Bandit:
Dan And Shay:
Close friend Ruby Rose broke down:
Alyson Stoner:
Missy Elliot:
Questlove:
Bebe Rexha:
