All I Want For Christmas Is You Mariah Carey
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Taylor Swift, Demi Lovato, Selena Gomez And Miley Cyrus: The Ultimate Super Group?
Taylor's worked with Ed, Demi's kicked it with Ariana Grande, Miley's teamed with Will.i.am and Selena dived into the pop punk world with Forever the Sickest Kids. If these four needed to call on someone to offer a lending hand, they certainly wouldn't be short of options.