Last night at Hot 99.5’s Jingle Ball 2012, presented by Charleston Alexander Diamond Importers at the Patriot Center, the stars were out in full force. Justin Bieber, Enrique Iglesias, Ke$ha, Flo Rida, Ed Sheeran, PSY, Austin Mahone and Cher Lloyd all performed in front of a sold out show.   More»

Michael C. Hall, Jon Voight, Matt LeBlanc and more stars from the popular Showtime series gather in Beverly Hills to celebrate the holidays; Usher, Amber Riley and more tribute Scooter Braun, Jane Lynch and Caren Brooks at the Southern California's ACLU Bill of Rights Dinner; Justin Bieber, Ke$ha, Psy and more perform for the second night of KIIS Jingle Ball; Betty White and adorable four-legged friends help celebrate the first anniversary of Love & Leashes at Westside Pavilion—find out more about L.A.'s top events from Monday in this installment of Last Night's Parties.

Pop music's hottest  artists including Carly Rae Jepsen, Taylor Swift, Nicki Minaj and Justin Bieber hit the 2012 American Music Awards; Skrillex and Skylar Grey celebrate the AMAs with Interscope; The Wanted performs for Joanna Krupa, Kendra Wilkinson and others at Us Weekly's Music Party; Nikki Reed, Brad Goreski, Jenny McCarthy and many more hit Rolling Stone's AMA after party; Joel McHale, Seth Green and numerous other comedians help Variety honor Seth MacFarlane—get the details on who turned up where during this very busy weekend in L.A. in this edition of Last Night's Parties.

Keira Knightly and costars step out for the Hollywood premiere of Anna Karenina; Drew Barrymore, Ben Stiller, Dita Von Teese and more help Kimberly Snyder launch her new juice bar in West Hollywood; Jesse Tyler Ferguson, Aisha Tyler, Julie Bowen and others celebrate marriage equality; Johnny Depp, Sarah Silverman and Nick Valensi cover Tom Petty and the Heartbreakers hits for charity; GQ hosts their annual "Men of the Year" party at Chateau Marmont with guests Rihanna, Ben Affleck, Aaron Paul and many more; Stevie Nicks performs at The Women's Guild Cedars-Sinai 55th Anniversary Gala—get the rundown on who was out at Tuesday and Wednesday's top events in this double dose of Last Night's Parties.

Ke$ha and Lou Adler ditch their signature looks for what could even be construed as formalwear for the 60th Annual BMI Pop Awards at the Beverly Wilshire, where Carole King is honored; Rosie Perez, Tracie Thoms and Diane Neal join Montblanc North America CEO Jan-Patrick Schmitz to announce the 2nd annual 24-Hour Plays Los Angeles charity event; battle rapper Supernatural freestyle raps the new lineup for Rock The Bells 2012, which will be a full weekend event this year featuring a reunited Bone Thugs N Harmony; Scott Caan, John McGinely and Josh Duhamel hit the links for Omega watches in Palos Verdes Estates. Tuesday was an activity filled day for our town's rich and beautiful (or in the case of Lou Adler, just rich), and we've got the rundown in today's Last Night's Parties! More»

While it's true that we don't always bump into famous people doing the same things we do for fun, that's mostly because the things we normally do for fun, like hunting for discount steak at Vons, don't really appeal to celebrities. When we go to Coachella, on the other hand, there's nothing separating the rich and famous from the regular music fan (maybe a VIP wristband, but who cares). Let's take a look at the famous faces spotted grooving out on Weekend One. More»

Jaime King, Fergie and Chloe Moretz attend JustJared.com founder, Jared Eng's birthday party at Pink Taco; Ke$ha, Rose McGowan and Sophia Bush honor entertainment media that raises awareness on animal issues at the 26th Annual Genesis Awards; Kendra Wilkinson and Kim Kardashian celebrate Perez Hilton's birthday with a Mad Hatter-themed tea party at Siren Studios—the rain didn't stop Los Angeles from partying this weekend and we've got the details on the biggest events and the celebrities who attended them in this installment of Last Night's Parties! More»

A genius parody "Will The Real Mitt Romney Please Stand Up (feat. Eminem)" music video surfaces; Lana Del Rey's new official music video is here, plus her upcoming NYC and L.A. residencies are announced; The Flaming Lips' new limited edition album of collaborations with a diverse group of their closest "fwends";  the truth about the new Daft Punk album; Marilyn Manson and Johnny Depp record a cover of Carly Simon's "You're So Vain"—get all of this and more on what's been going down in the wacky world of music so far this week in this Tuesday music news roundup! More>>

Lana Del Rey's new official music video is here, plus her upcoming NYC and L.A. residencies are announced; The Flaming Lips' new limited edition album of collaborations with a diverse group of their closest "fwends"; a genius parody "Will The Real Mitt Romney Please Stand Up (feat. Eminem)" music video surfaces; the truth about the new Daft Punk album; Marilyn Manson and Johnny Depp record a cover of "You're So Vain"—get all of this and more on what's been going down in the crazy music world so far this week in this Tuesday music news roundup! More»