The 22-year-old singer and Joe, 25, were joined by Joel McHale, Chord Overstreet, Ryan Guzman, Bow Wow, Robbie Rogers, Jesse McCartney, Kendrick Sampson, Terrence Jenkins, Mayer Hawthorne, Pia Mia, and JustJared.com‘s very own Jared Eng.
“The Grammy party craziness has begun…,” Nick wrote on his Twitter account.
Also pictured: Jesse, 27, attending the 2015 Billboard Power 100 Celebration that same evening with his model girlfriend Katie Peterson at Bouchon in Beverly Hills, Calif.
FYI: Nick is wearing Z Zegna.
25+ pictures of Nick Jonas and others at GQ’s New Z Zegna Collection Celebration… More Here! »