Mariah Carey thinks it was "nice" to spend Halloween with Nick Cannon.

Mariah Carey and Nick Cannon at Halloween (c) Instagram

Mariah Carey and Nick Cannon at Halloween (c) Instagram

The 'Hero' hitmaker threw a lavish party in Beverly Hills on Saturday (31.10.15), with both her ex-husband and current boyfriend James Packer in attendance, and she thinks its good for twins Moroccan and Monroe, four, to see their parents getting along.

She said: "It was cool. It was nice. It's really good for the kids."

Mariah hired a lavish estate via Airbnb for the party, which she threw because her children - who dressed as superman and supergirl - were so excited about the occasion.

She explained to ETOnline: "They wanted to be super heroes.

"They've been celebrating Halloween since August. So I figured, you know, we should have something fun, and a haunted house and really be festive so they can enjoy the holidays."

It was previously claimed the 'America's Got Talent' host is very supportive of his ex-wife's new romance.

A source said: "Nick is doing well in his personal life and he just wants Mariah to be happy.

"He feels as long as his kids are in good hands, he will support any decision Mariah makes.

"Mariah will always be in Nick's life that will never change. It makes Nick happy that Mariah is in a great place in her life between work and love."