Joel McHale, Victoria Justice and Giuliana Rancic step out for the L.A. Premiere of Bully at the Chinese 6 Theatres; Maria Menounos, Katherine Jenkins and the cast of "Dancing With The Stars" enjoy an after party at Mixology 101; Ariana Grande performs at a special concert for the DVD release of Alvin and the Chipmunks - Chipwrecked; Joel Kinnaman joins Mireille Enos on the red carpet for the season 2 premiere of AMC's "The Killing"—Monday night in L.A. was filled with red carpet events and we have the rundown of details and who was there in this installment of Last Night's Parties!

[Joel McHale, Victoria Justice, Giuliana Rancic via; Maria Menounos, Katherine Jenkins via; Billy Campbell, Mireille Enos via]