Every year, the who’s who of young Hollywood attends, and on Friday night (October 1) the 8th Annual Teen Vogue Young Hollywood Party was nothing short of a star-studded event.

Meeting up for a swanky Royal Bank of Canada hosted soiree, Katharine McPhee and Brittany Snow were on hand for Expedition Blue Planet's "A Night with Alexandra Cousteau" reception in Orange County on Monday night (July 26).

Held at the Revo headquarters, the "American Idol" alum and her "Hairspray" actress gal pal sipped on Blue Planetini cocktails before joining Alexandra as she showed a sneak peek of the first short film from her 2010 Expedition Blue Planet tour.

Famous people love a good party, and last night (May 4) Charlotte Ronson and JCPenny hosted the Spring Cocktail Jam in Los Angeles.

“90210” hotties Shenae Grimes and Jessica Lowndes turned up at Milk Studios to check out all the action, both sporting black ensembles.