ET Canada went backstage with the singer at her first performance since news broke of James Packer split.
The Queen of Christmas helped ring in the holiday season at Hudson's Bay and Saks Fifth Avenue's window unveiling.
The singer performed 'All I Want For Christmas Is You' at the unveiling of the Hudson's Bay annual Christmas window display in Toronto.
Before becoming Mariah Carey's ex-fiance, James Packer was best known for being among the top 500 richest people in the world.
New details surrounding the very expensive split between Carey and her former fiance have emerged.
He wanted a ceremony in March, even if it wasn't legal, a source tells ET.
ET looks into how Mariah Carey's ex fiance became one of the richest people in the world.
Packer put a ring on it, and now, Carey plans to keep it.
James Packer was sending Mariah Carey love notes in August, a source tells ET.
A source tells ET Mariah was "blindsided" by the split.
The pair's divorce was finalized just days before Mariah's split from billionaire James Packer.
A source tells ET the '#Beautiful' singer wanted to release a joint statement with her now ex.
Cannon filed for divorce from Carey in December 2014.
The two lived very separate lives, and Carey might have given ET clues that there was trouble in paradise.
