What do you do when Brad Pitt begins a thrashing air-guitar solo during an interview? When talking with Destiny's Child, should you praise the Lord, mmm-hmm! right along with them? And when shopping with the Olsen twins, just how do you keep yourself from feeling like a ''lumbering wildebeest, galumphing down the street''? Rolling Stone writer Jancee Dunn sprinkles these and other juicy anecdotes from the trenches of celebrity journalism into her breezy memoir, But Enough About Me..., about a Jersey girl done good. Blessed with self-deprecating wit, Dunn is an irresistible narrator whose eccentric family, dear friends, and disastrous ex-boyfriends are as entertaining as the megastars she has built a career on profiling.