Official “Circus” Album Credits

WOMANIZER - Main Version

Written by: Briscoe, Nikesha / Akinyemi, Rafael

Produced by: K. Briscoe / The Outsyders

CIRCUS - Main Version

Written by: Claude Kelly / Gottwald, Lukasz / Levin, Benjamin

Produced by: Blanco, Benny / Dr. Luke

Guitar: Gottwald, Lukasz

Keyboards: Blanco, Benny / Gottwald, Lukasz

Percussion: Blanco, Benny / Gottwald, Lukasz

Background vocals: Claude Kelly / Dennis, Cathy / Marie, Myah

OUT FROM UNDER - Main Version

Written by: Birgisson, Arnthor / Hector, Wayne / Peiken, Shelly

Produced by: Sigsworth, Guy

Guitar: Page, Andy

Keyboards: Sigsworth, Guy

Strings: Sigsworth, Guy

Background vocals: Haywood, Leah

KILL THE LIGHTS - Main Version

Written by: Araica, Marcella / Boyd, Luke / Hills, Nathaniel / Washington, James

Produced by: Danja / Beanz, Jim

SHATTERED GLASS - Main Version

Written by: Claude Kelly / Gottwald, Lukasz / Levin, Benjamin

Produced by: Blanco, Benny / Dr. Luke / Claude Kelly

Keyboards: Blanco, Benny / Gottwald, Lukasz

Percussion: Blanco, Benny / Gottwald, Lukasz

Guitar: Gottwald, Lukasz

Background vocals: Claude Kelly / Wagner, Windy

IF U SEEK AMY - Main Version

Written by: Kotecha, Savan / Kronlund, Alexander / Martin, Max / Shellback

Produced by: Martin, Max

Background vocals: Kinnda / Martin, Max / Spears, Britney

UNUSUAL YOU - Main Version

Written by: Jonback, Henrik / Karlsson, Christian / Livingston, Kasia / Pontus Winnberg

Produced by: Bloodshy & Avant

Guitar: Bloodshy & Avant / Jonback, Henrik

Keyboards: Bloodshy & Avant

Background vocals: Livingston, Kasia

BLUR - Main Version

Written by: Araica, Marcella / Barthe, Stacy / Hills, Nathaniel

Produced by: Danja

Background vocals: Boyd, Luke

MMM PAPI - Main Version

Main Artist: Spears, Britney / Let's Go To War

Written by: Gough, Adrien / Nicole Morier / Peter-John Kerr / Spears, Britney / Walter, Henry

Produced by: Let's Go To War / Nicole Morier

Guitar: Worthy, Chris

MANNEQUIN - Main Version

Written by: Fauntleroy II, James / Knox, Rob / Mason, Jr.,Harvey

Produced by: Knox, Rob / Mason, Jr.,Harvey

LACE AND LEATHER - Main Version

Written by: Gottwald, Lukasz / Levin, Benjamin / Jackson, Ronnie / Storm, Frankie

Produced by: Blanco, Benny / Dr. Luke / Claude Kelly

Keyboards: Blanco, Benny / Gottwald, Lukasz

Percussion: Blanco, Benny / Gottwald, Lukasz

Guitar: Gottwald, Lukasz

Background vocals: Nova, Debi / Sebert, Kesha

MY BABY - Main Version

Written by: Sigsworth, Guy / Spears, Britney

Produced by: Sigsworth, Guy

Guitar: Page, Andy

Piano: Page, Andy

Stings: Page, Andy

RADAR - Main Version

Written by: Karlsson, C. / P. Winnberg / H. Jonback / Lewis, E. / Muhammad, B. / Nelson, C. / Que, J.

Produced by: Bloodshy & Avant

Guitar: Bloodshy & Avant

Keyboards: Bloodshy & Avant

Source Cheiron Music