Miley Cyrus exposes herself? Robert Pattinson the texter? Katie Holmes keeps secrets?

U.S. singer Miley Cyrus performs during the Rock in Rio music festival in Arganda del Rey near Madrid June 6, 2010. REUTERS/Susana Vera (SPAIN - Tags: ENTERTAINMENT) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS

None of your secrets are safe if you’re a celebrity – their own assistants are dishing the dirt.

It’s all coming out! The good, the bad and the just plain weird.

According to the latest issue of Star, Britney Spears “talks in a baby voice all the time,” and Miley Cyrus “thinks it’s hilarious to greet first-time guests at the door and shock them with some skin.” – that girl really can’t be tamed!

They also reported that Tori Spelling only hires gay men to work on her staff for fear of losing husband Dean McDermott, and that Mariah Carey insists on drinking champagne from a straw!

Robert Pattinson is said to be constantly texting his rumoured girlfriend Kristen Stewart, and Katie Holmes reportedly keeps things from hubby Tom Cruise – including her secret smoking habit.