It's not really Fashion Week in our book until we accidentally crash Pete Wentz's private booth at a party. No really, you'd be surprised how many times we've done this. In any case, that means last night was a true kick-off, as we caught a raucous A$AP Rocky performance right alongside Mr. Fall Out Boy himself. The packed-in event at The Box was held in honor of the rapper's cool new collab with Guess Originals #ASAP4GUESS. Though the fire department made a brief appearance (they always seem to get an invite to the good parties, non?), our favorite fellow guests included Kendall Jenner, Hailey Baldwin, and Bella Hadid. Insta-star Eileen Kelly (@killerandasweetthang) totally stole the spotlight in a mesh number, however. Click through for an inside look!

Who was there: Guests included A$AP Rocky, Kendall Jenner, Hailey Baldwin, Bella Hadid, Justine Skye, Ellen Von Unwerth, Luka Shabbat, Ian Connor, Tamu McPherson, Wale, A$AP Twelvy, Joey Bad A$$, Serayah, Austine Mahone, Pete Wentz, Jasmine Sanders, May Kwok, Jesse Rutherford, A$AP Josh, Playboy Carti, Devon Carson, Issac Hindin-Miller, Shiona Turini, Lada Karvchenko, Yara Khmidan, Lil Uzi Vert, Mellissa Tammerijn, Iris van Berne, Madison Headrick, Eileen Kelly, Atlanta de Cadenet Taylor, Kenya Kinski-Jones, Jayne Moore, Shameik Moore, Mack Wilds.

Go HERE for more photos by Amy Pinard and tag yourself and your friends!