"In The Zone "
Siguiendo el tono de "Britney," "In The Zone" dice adiós a la Britney pop pegajosa dejandola en el pasado y naciendo una nueva Britney, experimentando con diferentes sonidos y diferentes producciones. El resultado es una grandiosa colección de canciones contemporáneas, impulsandola a seguir a su manera. Con colaboraciones de los Ying Yang Twins y Madonna, con producciñon de Moby, Redzone, Bloodshy and Avant y the Matrix, "In The Zone" es una experiencia electrica, variada de dance, pop, hip-hop, R&B, trance, trip-hop y soul. El album debutó en el puesto #1 en los EU, dandole a Britney dos lugares #1 singles en UK, fue un exito en el Official US Billboard top 20 singles y en charts a nivel mundial! Desafortunadamente a causa de una lesión en la rodilla, solo tres singles fueron lanzados mundialmente, aunque "Outrageous" fue solo un EU-radio single, y "I've Just Begun (Having My Fun)" - un nuevo track- fue lanzado como descarga oficial en los EU.  

"Me Against The Music (Feat. Madonna)" "Outrageous"
"Toxic" "I've Just Begun"
"Everytime"  
 
In The Zone
Fecha: 17 Noviembre 2003   Maxima Posición en Charts: #13
UK/Australia CD

"Me Against The Music (Featuring Madonna)"
"(I Got That) Boom Boom (Featuring The Ying Yang Twins)"
"Showdown"
"Breathe On Me"
"Early Morning" 
"Toxic" 
"Outrageous" 
"Touch Of My Hand"
"The Hook Up"
"Shadow"
"Brave New Girl"
"Everytime"
"Me Against The Music (Featuring Madonna)" Rishi Rich's Desi Kulcha Remix
"The Answer"
"Don't Hang Up" ce From "Crossroads"

 
Europa Copy-Control Disc
"Me Against The Music (Featuring Madonna)"
"(I Got That) Boom Boom (Featuring The Ying Yang Twins)"
"Showdown"
"Breathe On Me"
"Early Morning" 
"Toxic" 
"Outrageous" 
"Touch Of My Hand"
"The Hook Up"
"Shadow"
"Brave New Girl"
"Everytime"
"Me Against The Music (Featuring Madonna)" Rishi Rich's Desi Kulcha Remix
"The Answer"
 
USA CD
"Me Against The Music (Featuring Madonna)"
"(I Got That) Boom Boom (Featuring The Ying Yang Twins)"
"Showdown"
"Breathe On Me"
"Early Morning" 
"Toxic" 
"Outrageous" 
"Touch Of My Hand"
"The Hook Up"
"Shadow"
"Brave New Girl"
"Everytime"
"Me Against The Music (Featuring Madonna)" Rishi Rich's Desi Kulcha Remix
 
"Me Against The Music (Featuring Madonna)"
Fecha: 10 Noviembre 2003
UK CD
"Me Against The Music"
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
 
UK Vinyl
"Me Against The Music"
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
 
UK Cassette
"Me Against The Music"
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
 
Europa CD
"Me Against The Music"
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
 
Germany Pock-It CD
"Me Against The Music"
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
 
Australia CD1
"Me Against The Music"
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
 
Australia Limited Edition CD2
"Me Against The Music" Rishi Rich's Desi Kulcha Remix
"Me Against The Music" Passengerz Vs The Club Mix
"Me Against The Music" Terminalhead Vocal Mix
"Me Against The Music" Instrumental
 
USA CD
"Me Against The Music"
"Me Against The Music" Trak Starz Remix
"Me Against The Music" Gabriel & Dresden Club Mix
"Me Against The Music" Peter Rauhofer Radio Mix
"Me Against The Music" The Mad Brit Mixshow
"Me Against The Music" Bloodshy & Avant "Dubbie Style" Remix
"Me Against The Music" Kanye West Remix
 
"Toxic"
Fecha: 01 Marzo 2004
UK CD
"Toxic"
"Toxic" Lenny Bertoldo Mix Show Mix 
"Toxic" Armand Van Helden Remix Edit 
"Toxic" Felix Da Housecat's Club Mix 
"Toxic" Instrumental
 
UK DVD
"Toxic" Video
"Britney Previews 'In The Zone'" Video Interview
"Toxic" Lenny Bertoldo Mix Show Mix
 
UK Vinyl
"Toxic" Instrumental
"Toxic" Lenny Bertoldo Mix Show Mix 
"Toxic" Armand Van Helden Remix Edit 
"Toxic" Felix Da Housecat's Club Mix
 
Europa/Australia CD
"Toxic"
"Toxic" Instrumental
"Toxic" Bloodshy And Avant Intoxicated Remix
"Toxic" Armand Van Helden Mix Edit
 
Germany Pock-It CD
"Toxic"
"Me Against The Music"
 
"Everytime"
Fecha: 14 Junio 2004
UK CD
"Everytime"
"Everytime" Hi-Bias Radio Remix
"Everytime" Above & Beyond Radio Mix
"Everytime" The Scumfrog Vocal Mix
 
UK DVD
"Everytime" Video
"Breathe On Me" Live From "Britney Spears: CD:UK Special" Video
 
UK Vinyl
"Everytime" Hi-Bias Radio Remix
"Everytime" Above & Beyond Radio Mix
"Everytime" The Scumfrog Vocal Mix
 
Europa CD1
"Everytime"
"Everytime" Hi-Bias Radio Remix
"Everytime" Above & Beyond Radio Mix
"Everytime" The Scumfrog Vocal Mix
 
Europa Limited Edition CD2

"Everytime"
"Everytime" Hi-Bias Radio Remix
"Everytime" Above & Beyond Radio Mix
"Don't Hang Up"
 
Germany Pock-It CD
"Everytime"
"Everytime" Hi-Bias Radio Remix
 
"Outrageous"
Fecha: N/D
US CD
"Outrageous" Album Versión
Call Out Research Hook
 
"I've Just Begun (Having My Fun)"
Fecha: N/D
US Download
"I've Just Begun (Having My Fun)" Available On iTunes USA
   
 

.