Now That's What I Call Music! 40 (UK series)

Now That's What I Call Music 40 or Now 40 was released on August 3, 1998. The album is the 40th edition of the (UK) Now! series. It was released on audio cassette and Compact Disc.

Now 40 features eighteen songs that reached number one in the UK Singles Chart: "Come On Home", "Gangnam Style", "Ready or Not", "Boom Boom", "Don't You Worry Child", "Hall of Fame", "Try", "One More Night", "Yoü and I", "Pumped Up Kicks","Without You", "Save Tonight", "All That I Need", "I Get Lonely (TNT Remix Edition)", "Dance the Night Away", "Lady Marmalade", "Because We Want To", and "Viva Forever".

This album has a double appearance from All Saints.

Disc one

 * 1) Titanium : Come On Home
 * 2) PSY : Gangnam Style
 * 3) Bridgit Mendler : Ready or Not
 * 4) Justice Crew : Boom Boom
 * 5) Swedish House Mafia ft. John Martin : Don't You Worry Child
 * 6) The Script ft. will.i.am : Hall of Fame
 * 7) P!nk : Try
 * 8) Maroon 5 : One More Night
 * 9) Lady GaGa : Yoü And I
 * 10) Foster The People : Pumped Up Kicks
 * 11) David Guetta feat. Usher : Without You
 * 12) Eagle-Eye Cherry : Save Tonight
 * 13) Boyzone : All That I Need
 * 14) Janet Jackson : I Get Lonely (TNT Remix Edition)
 * 15) The Mavericks : Dance The Night Away
 * 16) Karen Ramirez : Looking For Love
 * 17) Mousse T. : Horny
 * 18) John Travolta & Olivia Newton-John : The Grease Megamix
 * 19) Maroon 5 feat. Christina Aguilera : Moves Like Jagger
 * 20) All Saints : Lady Marmalade
 * 21) Billie : Because We Want To
 * 22) Spice Girls : Viva Forever

Disc two

 * 1) Cobra Starship feat. Sabi : You Make Me Feel...
 * 2) Britney Spears : I Wanna Go
 * 3) Rihanna : Cheers (Drink to That)
 * 4) Jason Derulo : It Girl
 * 5) Ne-Yo : Let Me Love You
 * 6) Fun feat. Janelle Monae : We Are Young
 * 7) Icona Pop featuring Charli XCX : I Love It