Demi Lovato is 'filled with joy' after Grammy nomination

Demi Lovato Says She’s "Filled With Hope" After Grammy Nomination

Demi Lovato

Christina Aguilera Carpool Karaoke

WATCH: Christina Aguilera Teaches James Corden How To Diva In Carpool Karaoke

Christina Aguilera And Ariana Grande Instagram

WATCH: Ariana Grande & Christina Aguilera Singing ‘Dangerous Woman’ Just Gave Us SERIOUS Chills

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Christina Aguilera Ellen Degeneres

WATCH: Christina Aguilera Sings Rihanna, Beyonce And MORE In Game With Ellen!

Christina Aguilera Teaching

Class In Session With Your New Teacher... Christina Aguilera!

Ariana Grande musical impressions

WATCH: Ariana Grande’s Singing Impressions Of Britney & Christina Aguilera Are Spot On

Ariana Grande