Katy Perry - Stéphane Rolland Photo: Getty Images
Vanessa Hudgens - Yanina Couture Photo: WireImage
Olivia Munn - Nicolas Jebran Photo: Getty Images
Demi Lovato - Zuhair Murad Photo: WireImage
Alessandra Ambrosio - Balmain Photo: Getty Images
Hailey Baldwin - Zuhair Murad and Jennifer Fisher jewelry Photo: Getty Images
Millie Bobby Brown - Rodarte and Stuart Weitzman shoes Photo: Getty Images
Pink, Carey Hart and Willow Photo: Getty Images
Hailee Steinfeld - Atelier Versace Photo: Getty Images
Nicki Minaj Photo: WireImage
Lorde- Monique Lhuillier Photo: Getty Images
Mel B and Heidi Klum in Dundas dress, Giuseppe Zanotti shoes and Lorraine Schwartz jewelry Photo: Getty Images
Paris Jackson - Dior Photo: Getty Images
Fallout Boy (Andy Hurley, Patrick Stump, Pete Wentz and Joe Trohman) Photo: Getty Images
Mena Suvari and Michael Hope Photo: Getty Images
Kesha Photo: Getty Images
Shawn Mendes Photo: WireImage
Cardi B - Christian Siriano Photo: Getty Images
Jasmine Sanders - Moschino and Sophia Webster shoes Photo: WireImage
Ed Sheeran and Jennie Pegouskie Photo: Getty Images
DNCE - Jack Lawless, Joe Jonas, JinJoo Lee and Cole Whittle Photo: Getty Images
Lil Mama Photo: Getty Images
Bebe Rexha Photo: Getty Images
Ludacris and Eudoxie Mbouguiengue Photo: Getty Images
Fifth Harmony (Dinah Jane, Ally Brooke, Normani Kordei, and Lauren Jauregui) Photo: Getty Images
Thirty Seconds to Mars (Tomo Milicevic, Shannon Leto, and Jared Leto) with The Chainsmokers (Andrew Taggart and Alex Pall) who wore Ermenegildo Zegna Couture Photo: Getty Images
Yara Shahidi - Zimmerman dress, Giuseppe Zanotti and earrings by Porcelain Chyna Photo: Getty Images
Julia Michaels Photo: Getty Images
Noah and Billy Ray Cyrus Photo: Getty Images
Calvin Harris Photo: Getty Images
Kendrick Lamar, DJ Khaled, and Asahd Tuck Khaled Photo: Getty Images