Katy Perry, Orlando Bloom, Conan O'Brien, Chloe Sevigny Nikki Reed and many other A-listers get chummy on the rooftop of a charity event hosted by Coach and J.J. Abrams; Morgan Freeman and Tom Cruise pose for photos with their fans at the Oblivion premiere in Hollywood; Kyle Richards and Rosanna Arquette hang out at the TEEN LINE Food For Thought Luncheon—see who was out on the town hitting L.A.'s top events yesterday in this installment of Last Night's Parties.

Over the weekend, President Obama and Vice President Biden were sworn in for their second term and a whole lot of partying commemorated the occasion. Here's where celebrated the 57th Inauguration:

[More added 1/17--check the last slides] With bars open until 4am and politicos ready to party, there will be a lot going on to celebrate Obama's second Inauguration. Even if you missed out on the official ball tickets from the Presidential Inauguration Committee, there are still a lot of events you won't want to miss (in fact, most of the ones here will be better parties, period)! Balls come and go every 4 years, so pay attention to learn what's hot and what's not for 2013.

The Obamas and Bidens have been invited to basically all of the events listed here. They are only obligated to show up to the two official balls but just might pop in when you least expect them to...

Kirsten Dunst, Elijah Wood and many other well-noted stars enjoy music by John Legend at The Art of Elysium's 6th Annual HEAVEN Gala; Anne Hathaway, Ben Affleck, George Clooney and Lena Dunham are among the many celebrated at the AFI Awards Reception; Amanda Seyfried, Sienna Miller, Hugh Jackman and a bevy of other notables sip tea at the BAFTA Tea Party; Keith Urban and Nicole Kidman honor the land down under with other famous Aussies at the 2013 G'Day USA Black Tie Gala; Leonardo DiCaprio, Bradley Cooper, Eddie Vedder, Julia Roberts and many more A-listers come together in support of the 2nd Annual Sean Penn And Friends Help Haiti Home Gala—get all of this and so much more in this jam-packed Golden Globes Weekend event roundup!

Anne Hathaway, Joseph Gordon-Levitt celebrate with other well-reviewed stars at the Critics' Choice Movie Awards; Jamie Pressly and Renee Olstead do some pre-Golden Globes shopping at the Kari Feinstein Style Lounge; Carmen Electra hosts the Markus + Indrani Icons Book Launch Party at a swanky gallery in West Hollywood; Anna Kendrick, Brittany Snow and Alison Brie share a visual feast at the Alberta Ferretti and Vogue fashion show and dinner at Chateau Marmont—take a look at Thursday's top events in this installment of Last Night's Parties.

[Amanda Hearst, Georgina Bloomberg] [Alexa Chung, Cynthia Rowley, Derek Blasberg] [Waris Ahluwalia, Laure Heriard Dubreuil]

Last night in NYC, Derek Blasberg invited his friends to the St. Regis Hotel for afternoon tea to celebrate the launch of his new stationery collaboration with Opening Ceremony, Mayor Bloomberg stepped out with his daughter Georgina for the Humane Society's "To The Rescue" gala, Uma Thurman attended the 10th Annual Benefit Auction at Christie's, and so much more!

Francis Ford Coppola attends a screening of On The Road with Kristen Stewart and Garrett Hedlund; Reese Witherspoon, Zoe Saldana and Conan O'Brien are among the many at the CDF's "Beat The Odds" Awards; Fergie and Voli Light support Cell Phones for Soldiers; Olivia Munn, Brittany Snow and more attend the Giorgio Armani Beauty Luncheon; Matt Damon, John Krasinski, Gus Van Sant and others celebrate the premiere of Promised Land—Thursday was loaded with events of all kinds and we have them for you in this installment of Last Night's Parties.

Denzel Washington, Kelly Reilly and others hit the Flight premiere in Hollywood; Ben Affleck, Amy Adams, Bradley Cooper and Robert De Niro are just a few of the many honored at the annual Hollywood Film Awards Gala; Brad Goreski scopes out the beautifully revamped Dior boutique on Rodeo Drive; Elisabeth Moss is on fire with a seriously chic new look while Jon Hamm has a makeup mishap at a Paley Center event—get the rundown on Monday and Tuesday's top events around town in this double dose of Last Night's Parties.

Last night in NYC, Robert Pattinson pleased fans with his Cosmopolis premiere appearance at the MoMA, Jessica Chastian and Shia LaBeouf join the Cinema Society and YSL for the Lawless premiere, White Denim take over the Brooklyn Bowl, and more! Last night's parties were all about being in the spotlight. More»

Last night in NYC, Jason Wu helped kick off the summer with the WSJ's Summer Pool Party with Off Duty, Abbie Cornish and Zoe Saldana attended the opening night of the Persol Magnificent Obsessions exhibit with special guest DJ Terry Richardson, Isabeli Fontana hosted a private dinner for Faith Connexion at Cipriani Downtown, Robert De Niro was honored at Ghetto Film School's annual benefit gala, and more! Last night's parties were full of summer festivities. More»