ABC News December 20, 2016

Mariah Carey on Demi Lovato: 'I Don't Know Her'

Name: Mariah Carey on Demi Lovato: 'I Don't Know Her'
Uploaded: 2016-12-20T06:57:37
Duration: PT106.0S
Description: Andy Cohen of "Watch What Happens Live" asked Carey about Lovato and Ariana Grande.

Andy Cohen of "Watch What Happens Live" asked Carey about Lovato and Ariana Grande.

Mariah Carey on Demi Lovato: 'I Don't Know Her'

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