Mariah Carey is explaining her engagement "slowly" to her children.

Mariah Carey

Mariah Carey

The 'Hero' hitmaker recently accepted a marriage proposal from billionaire James Packer and she wants to reassure her four-year-old twins Moroccan and Monroe - who she has with former husband Nick Cannon - that changes to her personal life won't affect them.

She said: "I haven't talked to them about it completely because they are so young so they don't really understand things yet so you have to go slowly and explain things and always make sure they know that this is only going to be good for them. Their lives are not going to change.

"For me, as long as we are together and they have a great relationship with their dad, then that's great. It's good. And they are great."

The 45-year-old singer always makes a point of being "positive" about Nick to her kids and thinks she and the 'America's Got Talent' host are doing a good job with co-parenting.

She told E! News: "I think we are trying our best. I really do.

"I know I am trying my best and I think he is too. I know they love being with him and it's nice and I will always say positive things about him to the kids."

But Mariah is trying hard not to spoil the twins.

She added: "Between Nick and what he does for them and then what I do for them, I just think please don't let these kids be spoiled.

"I have to reel it in."