9:15 pm -- Julie Chen and Big Brother contestant (and Ariana Grande’s brother) Frankie Grande seen embracing on the red carpet outside the event at Ace Theater.
9:45 pm -- Shawn Mendes walks the red carpet at Universal's afterparty as the crowd cheers.
10:00 pm -- A crowd gathers at the "make your own cookie bar" inside the Universal party -- a huge hit after a long day.
10:07 pm -- Lisa Vanderpump spotted waiting for the valet.
10:24 pm: Patrick Carney of The Black Keys seen holding court inside the Universal party with a small group.
10:30 pm: Cash Money Records co-founder Slim (Ronald “Slim” Williams) seen leaving the Universal party.
11:24 pm -- Missy Elliott has arrived onstage at the Warner Music party at Milk Studios.
11:25 pm -- Gary Clark Jr bows before Busta Rhymes at the Warner party.
11:30 pm -- Dwight Yoakam leaves in the middle of Missy's set!
11:30 pm -- At the Sony party, Clive Davis congratulates RCA Records’ Peter Edge and Tom Corson on Mark Ronson’s win.
11:44 pm -- Missy Elliott runs out into the crowd in the middle of her blazing set at the Warner Music party and delivers nearly an entire song standing on a couch in the middle of the crowd. Stephen Hill from BET jumps on the couch and tries to dance alongside her.
12:04 am -- Patrick Carney of The Black Keys (again) holding court, this time at Milk Studios on the front patio. He's wearing his usual leather jacket.
12:15 am -- Louis Tomlinson gathers his posse and heads out from Sony party for the Weeknd/GQ party up in the hills.
12:45 am -- Paul McCartney arrived at the Republic party, with Taylor Swift showing up a few minutes later with many members of her squad, including Calvin Harris, Ellie Goulding, Lorde, Haim and Hailee Steinfeld.
1:30 am -- TDE party at Hollywood Roosevelt is at capacity... and then some.