The 'Without You' singer admits she and the rapper often have little rows over their closet space because his side is much neater than hers.

She said: "Each of us has their own areas that we decorated. The closet is where we have our little battles, He has a whole wall full of sneakers, while I have multiple walls of high heel shoes. And yet his sneakers look better than my shoes. I'm like, 'How is this happening?' I had a stylist come do this and he did it himself. I guess he just knows what he is doing."

Mariah recently revealed she and Nick have "lots of phone sex" to keep the romance alive when their work sends them to separate cities.

Asked how he and Mariah coped with being apart, Nick said: "There's lots of phone sex! And when I get home, we have a big party!"