By Sandra Rose  | 

NGRE / BACKGRID

Mariah Carey is happy for her ex-husband Nick Cannon after the news broke that he is expecting his 8th child.

Nick and his 5th baby mama, Bre Tiesi, held a gender reveal party with blue and pink balloons in Malibu, California last weekend. The couple is expecting a boy.

A source said Mariah is "supportive" of her ex-husband who left their marriage on good terms with an agreement to co-parent their twins, Moroccan and Monroe.

FayesVision/WENN.com

"Mariah and Nick are really great co-parents and have a good relationship [and] friendship now so any time Nick has exciting news to share, she's just happy for him," a source told Us Weekly exclusively.

The source said Mariah, 52, is happy about Nick and Bre Tiesi's baby news. "They're in a good place and they're supportive of each other no matter what."