Someone's getting their daily dose of carats.

And not in the veggie sense (that's carrots, people), but rather the size of the diamond on her finger.

Mariah CareyBut what is the big rock on her finger saying?

That's what we'd like to know from the lady who has us guessing - one Ms Mariah Carey.

See, Mariah stepped out at the prem of her new movie, Tennessee, which debuted at the Tribeca Film Festival, sporting some heavy bling on her ring finger.

There to support her was the man who's, erm, rocking her world, her beau Nick Cannon.

Now, neither Mariah nor Nick's peeps are dishing any romantical gossip.

In fact, Mariah even told People she only had eyes for one man: Jack, her Jack Russell pooch.

He must be on some allowance if he gave her that rock.

Somehow though we suspect it may have come from elsewhere...

Until we hear who's been dishing out diamonds to Mariah, we'll have to sit tight and wait in anticipation.