Katy Perry, Pink, Shawn Mendes and More: Best Reactions to Fan Covers on YouTube | Glamour

Here are the best moments of "You Sang My Song." Watch Pink, Mariah Carey, Katy Perry, Grace VanderWaal, Shawn Mendes and Demi Lovato watch fan covers on YouTube, and see the fans react to hearing from their idols.

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Katy Perry, Pink, Shawn Mendes and More: Best Reactions to Fan Covers on YouTube | Glamour