Mariah Carey's musical twins

Pop diva Mariah Carey has revealed her twins Moroccan and Monroe have been showing signs of sharing her talent for singing.

The "Beautiful" hitmaker said her four-year-old kids sing backing vocals when she's practicing at home, reported Contactmusic.

"They sing my new song Infinity already, they're already doing the background vocals... So that's a good sign to me!," she said.

Carey, 45, said life with the twins - whose father is the diva's estranged husband Nick Cannon - can be hectic but always fun.

Recalling her difficult pregnancy with the pair, she said, "The pregnancy itself, it was very difficult. I had gestational diabetes, I had preeclampsia, I had all these things you don't even want to know about...