Khloé Kardashian and Kendall and Kylie Jenner posed for photos at the GQ and Giorgio Armani bash.

Miranda Kerr [3] made an appearance at the Warner Music Group event.

Charli XCX was a dancing machine during her performance at the Warner Music party.

Rihanna [4] got touchy-feely with Universal Music Group CEO Lucian Grainge at their Grammys afterparty.

Armie Hammer, Calvin Harris, Ricky Martin, and Josh Groban posed with Armani executive Roberta Armani at the GQ bash.

Michelle Rodriguez and Paris Hilton [5] partied together at the Warner Music event.

Annie Lennox celebrated her epic Grammys performance at the Warner Music party.

Rita Ora relaxed at the Warner Music Group afterparty.

Janelle Monáe looked ravishing in red at the GQ and Giorgio Armani event.

Jamie Foxx [6] and Taye Diggs [7] were a dapper pair at the Warner Music celebration.

Pierce Brosnan [8] and his son, model Dylan Brosnan, attended the Rock Against Trafficking event.

Sheryl Crow [9] made a standout appearance at the Warner Music party.

Hailee Steinfeld attended the Republic Records Grammys afterparty.

Taylor Swift [10] and Jaime King left the Warner Music afterparty arm in arm.

Beck celebrated his big win with his wife, Marissa Ribisi, at the Universal Music bash.

Sam Smith changed into a suit and bow tie for the Universal Music Group party at the Ace Hotel.

Nick Jonas [11] and girlfriend Olivia Culpo posed on the red carpet at the Universal Music party.

Courteney Cox [12] stayed close to her fiancé, Johnny McDaid, at the Warner Music afterparty.

Mark Ronson, his sister Samantha, and their stepfather, singer Mick Jones, hung out together at the Warner Music party.

Katy Perry [13] helped Sam Smith celebrate his multiple wins at the Universal Music Group afterparty.