Elizabeth Banks, Jessica Alba, Zac Posen and more talk fashion at the Annenberg Community Beach House; stylists and tastemakers attend the opening of the new L.A. Montblanc boutique; Shailene Woodley, Laura Leighton and other stars of ABC Family light up the red carpet at the network's West Coast Upfronts; Diane Lane, Kathy Griffin, Gloria Steinem and more celebrate the anniversaries of Ms. Magazine and the Feminist Majority Foundation at the Beverly Hills Hotel; Amber Riley faints (but is okay now) on the red carpet with her co-stars at a special screening of Fox's Glee—it's been a bustling couple of days here in Los Angeles and we have the details on what went down Monday and Tuesday for you in this two-day installment of Last Night's Parties. More»

Common performs for Olivia Munn and Kim Kardashian to celebrate the USA Basketball team and Jeep; Will Ferrell, Michael Chow and other big supporters of LACMA attend the annual Collectors Committee dinner gala and view the new works of the permanent collection; Tobey Maguire, Ben Affleck and more show support for arts education at the Children Mending Hearts Spring Benefit; Ian Somerhalder hosts a private charity dinner event in Bel Air; Johnny Knoxville, Julie Bowen and Anthony Kiedis celebrate Earth Day at the Annenberg Community Beach House—it was another busy weekend of events and fundraisers here in L.A. and we have the details on what went down in this edition of Last Night's Parties. More»

Go HERE for more photos by Casandra Campeas and tag yourself and your friends!

How do cool parents celebrate Earth Day with their kids? With live performances by very famous musicians, edible art projects, fossil digs, manicures and DJ lessons on the beach in L.A., as was the case at the book launch of Last Night I Swam With A Mermaid yesterday at the Annenberg Community Beach House where hip moms and dads like Julie Bowen, Jason Bateman, Johnny Knoxville and others stepped out for the family friendly occasion. More»