Taylor Swift surprised her fans on Halloween by bringing Idina Menzel onstage to sing a duet of Let It Go. Subscribe for more videos: http://full.sc/NfhdwD
Let It Go performance: https://www.youtube.com/watch?v=eBTADWQKB7w Alessia Cara performance: https://www.youtube.com/watch?v=yw-1XT6HSTc
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