Jennifer Hudson, Kesha, Adam Lambert, John Legend, Billy Porter, Chante Moore, Charlie Puth, Dave Grohl, EG, FLO, Foo Fighters, Gayle King, Jermaine Dupri, Jorja Douglas, Kim Burrell, Laufey, Renee Downer, Rita Wilson, Spliff Star, Stella Quaresma, Taylor Momsen, Teddy Swims seen at Los Angeles Convention Center