Busy Philipps, Ellen Pompeo and other famous mothers give mom-to-be Anna Paquin a taste of what new parent life is like at a Saturday Luau event; Kelly Osbourne, Katherine Jenkins and other transplants from across the pond honor Piers Morgan with a BritWeek celebration; Julie Bowen, Lisa Kudrow and more hit the P.S. Arts Los Angeles Modernism opening night gala; Kim Kardashian steps out in support of Generosity Water—see what else celebrities were up to this weekend when they weren't partying for Cinco de Mayo in this installment of Last Night's Parties. More»

Last night was a whirlwind of places you wish you would have been. Los Angeles collectively celebrated it being Tuesday with everything from picnics to premieres, with heavy hitters like L.A. Reid, Ice Cube, Mena Suvari and Kimora Lee Simmons joining in the festivities. You've had enough time to shake off your daylight savings confusion by now, so come see what went down in Tinseltown with today's edition of "Last Night's Parties!" More»

Dita Von Teese, Jenna Elfman and more hit Luis Barajas and Emmy Rossum's Winter feast/cocktail party; Starz! rolls out the black carpet for the premiere of new original series "Spartacus Vengeance" in Hollywood; John Baldessari, Joel Silver, and Diane Keaton step of for the debut of Rodarte's newest collaboration with LACMA; Steve Aoki has a record release party; Mr. & Mrs. Smith throw a chichi launch party for their new travel guide book at Soho House; the Winklevi turn up at Connor Cruise's 17th bday bash at the Clippers game—it was just another Wednesday night L.A., let's discuss in this edition of Last Night's Parties. More»

Nicole Richie, Mindy Kaling and Samantha Ronson welcome Pressed Juicery to WeHo; cover girl Kate Beckinsale hosts a dinner at the SLS for FLAUNT; Gelila and Wolfgang Puck, Devon Aoki, Brett Ratner and more celebrate Vertu's new luxury mobile device; Justin Bieber, Jake Gyllenhaal and the Kardashians catch the final Watch The Throne concert at Staples—last night was proof L.A. is not slowing down for the holidays, get all the details in this edition of Last Night's Parties. More»