Mariah Carey 101: How to Be a Diva

The ultimate guide to birthday girl Mimi – champagne, tight clothes and butterflies everywhere!

6. ADD STAR POWER TO EVERYTHING

Don't go it alone! Carey's videos are a catalog of cameos: Jack McBrayer played a geek in "Touch My Body," Wentworth Miller and Eric Roberts smoldered in "We Belong Together," and Jerry O'Connell was an unfaithful beau in "Heartbreaker."