Young Hollywood turns out for T-Mobile

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Well, now we know.

Here's why Eva Longoria, from the award-winning show "Desperate Housewives," was in such a mad rush to get her hair done Tuesday evening at Jordan's Enchanted Cottage in West Hollywood.

She was headed straight to the T-Mobile Sidekick 3 party held later that night at the Hollywood Palladium.

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The place was packed with the usual celeb suspects such as the Backstreet Boys, LA club empresario Brent Bolthouse, Donovan Leitch, Serena Williams, Jaime King, Rachel Bilson, "Crash" director Paul Haggis, Taryn Manning, Amanda Bynes, Haylie and Hilary Duff, Jessica Simpson, Mischa Barton with beau Cisco Adler, whew, and those still  battling ex-BFs Nicole Richie and Paris Hilton.   

And in case you were wondering, yes, all the attending celebs got a free Sidekick 3 for their time and trouble. 

Richie was spotted inside flailing her pipe cleaner arms while dancing with Mario Lopez. With her new long blonde hair extensions, she really does look like a Paris Hilton clone. But she's getting so darn emaciated that we're gonna start calling her Auschwitz Hilton.

Meanwhile, Paris has cleverly figured out a way to really stand out at parties. Bring brunette friends! She spent most of the night posing and partying with her new bookend brunette sidekicks, Caroline D'Amore and Kim Kardashian.

Photo Credits: Jessica Simpson and Eva Longoria put their perfectly coiffed heads together to figure out the new T-Mobile Sidekick 3. Good luck, girls.
WireImage/Gregg DeGuire

Photo Credits: Whoa, watch where you wave those buggy whips, little lady. You could poke someone's eye out! Nicole Richie shows off her moves with Mario Lopez at the T-Mobile Sidekick 3 bash.
WireImage/Chris Weeks