Ashton Kutcher showed face at the GQ's Gentleman's Ball, Zoe Kravitz hosted a night for charity at Reformation, Justin Timberlake partied at Southern Hospitality, Electric Youth and College performed at 3x1, Theophilus London took the stage at Terminal 5 and DJ'ed Le Bain and so much more.  Last night's parties were all about music!

[Photo via BFA]

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