When it comes to red carpet events, Hollywood is kinda like India: There's a caste system. The brahmins at the top get to arrive whenever they want, diss whoever they want, talk to the masses, or not. And the untouchables--fledgling pop singers, wannabe reality sensations, regional beauty queens--scrape and hustle for whatever they can get. A lot goes on behind the scenes of a movie premiere or awards-show arrival schedule. And in this, my latest episode, I break it all down: Why do you hear from some stars when others remain silent? Why does one star arrive 30 minutes earlier than another if they're in the same movie? And why was McDreamy ever relegated to the untouchables category?

What else can you look forward to in this edition? How about...

• The real reasons why Angelina Jolie was able to keep her wedding so quiet, starring this week's co-host and celebrity wedding insider Harmony Walton of The Bridal Bar
• The totally obvious reason why Bill Gates challenged Ryan Seacrest to the ice bucket challenge
• Why every woman on the planet owes a thank-you to Joan Rivers