Composer: Łukasz Gottwald & Katy Perry & Bonnie McKee & Max Martin
Lyricist: Łukasz Gottwald & Katy Perry & Bonnie McKee & Max Martin
Composer: Calvin Harris & Ellie Goulding
Lyricist: Calvin Harris & Ellie Goulding
Composer: Max Martin & Shellback & Savan Kotecha & Usher Raymond
Lyricist: Max Martin & Shellback & Savan Kotecha & Usher Raymond
Composer: Armando C. Perez & Łukasz Gottwald & Henry Walter & Jamie Sanderson & Breyan Isaac & Priscilla Hamilton & Kesha Sebert & Lee Oskar & Keri Oskar & Greg Errico & Steve Arrington & Charles Carter & Waung Hankerson
Lyricist: Armando C. Perez & Łukasz Gottwald & Henry Walter & Jamie Sanderson & Breyan Isaac & Priscilla Hamilton & Kesha Sebert & Lee Oskar & Keri Oskar & Greg Errico & Steve Arrington & Charles Carter & Waung Hankerson
Composer: Ke$ha & Lukasz "Doctor Luke" Gottwald & Benjamin Levin
Lyricist: Ke$ha & Lukasz "Doctor Luke" Gottwald & Benjamin Levin