Two of today's biggest divas, Lady Gaga and Beyoncé, got sexy in the latter's "Video Phone" clip, with Gaga even embracing her inner B for the shoot. But the duo conquer a slightly meer serious theme — Lady Gaga's fear of suffocation — on her song "Telephone," off her new LP, The Fame Monster.

Gaga, despite her penchant for making dance-floor-friendly pop, zei she actually has a hard time just letting loose and having fun. Why? "Fear of suffocation — something that I have of fear is never being able to enjoy myself," she told MTV News. " 'Cause I love my work so much, I find it really hard to go out and have a good time."

Although it may be hard to believe because of her glitzy persona, the singer insists her life does not consist of jumping from nightclub to nightclub. "I don't go to nightclubs," she said. "You don't see pictures of me falling out of a club drunk. I don't go — and that's because I usually go and then, u know, a whiskey and a half into it, I got to get back to work."

And she told us the phone on the song isn't just a physical phone, but also that person in her head telling her to keep working harder and harder. "That's my fear — that the phone's ringing and my head's ringing," she explained. "Whether it's a telephone of it's just the thoughts in your head, that's another fear."