See the Stars Who Hit the Party Circuit This Weekend to Celebrate the Grammys

made a date night out of Sony Music Entertainment's post-Grammy reception party held at The Palm. Perry, in an iridescent blue Giorgio Armani gown, had several dress changes throughout the Grammys, including her costume change for her "Dark Horse" performance with Juicy J.

arrived at the second annual Billboard Grammy after-party at The London West Hollywood hotel in a Georges Chakra dress. "I just loved it and I thought it was perfect," Winter tells InStyle.com. "It also has the perfect edge to it." Mike Posner, Darren Criss, and others also joined Winter at the event.

stepped out for Warner Music Group's annual Grammy celebration party at the Sunset Tower Hotel. Bruno Mars, Chris Martin, Anjelica Huston, and more also joined Wiseman and Beckinsale (in Rubin Singer) at the event, which featured a performance by Nile Rodgers and The Chic.

The new best friends came together during Clive Davis' pre-Grammy Gala honoring industry icons including Lucian Grainge at The Beverly Hilton. Not only did Lorde perform two of her hit songs, but also Swift (in Zuhair Murad) danced along to Lionel Richie, Imagine Dragons, Macklemore & Ryan Lewis, and other performers.

also attended Clive Davis' pre-Grammy party, where Cyrus (in Calvin Klein) performed a few of her hit songs including "Get It Right" and "Wrecking Ball."

made for the chicest couple at the Nielsen Grammy Weekend celebration at Herringbone in The Mondrian Los Angeles. Legend was the evening’s entertainment and took to the stage with a full brass band and performed several of his hits including “Ordinary People.”

reunited for the Beats Music Launch Party held at Belasco Theatre at Belasco Theatre in Los Angeles.

both attended the MusiCares Person Of The Year Honoring Carole King at Los Angeles Convention Center. Lady Gaga (in Alexis Mabille Couture) was among the many performers of the night, where she played a rendition of "You've Got a Friend." "It is my absolute privilege to be honoring such an incredible woman, a true musical genius," Gaga said, explaining that as a teen she often played the song in her father's room. "I would crank this so high. I really believed so much, Carole, that you were my friend. Thank you for inspiring us female songwriters every day."