Mariah Carey wears ballgown to the recording studio.

I always wear a tux to bed. I'm crazy like that.....
Star Pulse:
Mariah Carey lived up to her diva tag when she joined Black Eyed Peas star in the studio recently - she wore a ball gown. But the hip-hop super producer insists that Carey wasn't trying the make a statement - she just couldn't be bothered to change.
The My Humps hitmaker explains, "Mariah was cool. She came into the studio wearing a big ball gown. She was like, `I'm so sorry! I know everybody thinks I'm a diva, but I'm wearing this because I've just come from a party and I didn't want to go home and change.' She's a real diva in her own right, but she is real cool."