Now That's What I Call Music! 78 (UK Series)

'Now That's What I Call Music! 78 or Now! 78' is a double-disc compilation album that was released in the United Kingdom on 11 April 2011 on CD and downloadable formats. The album is the 78th edition of the UK Now! series.

''Now! 78'' features six songs which reached number one on the UK Singles Chart: "Grenade", "We R Who We R", "When We Collide", "Price Tag", "What's My Name?", and "The Time (Dirty Bit)".

This album has double appearances from Jessie J, Ellie Goulding, Tinie Tempah, Taio Cruz, Chris Brown and Wiz Khalifa; in addition to a triple appearance from Rihanna.

CD 1

 * 1) Bruno Mars : "Grenade"
 * 2) Adele : "Rolling in the Deep"
 * 3) Jessie J : "Do It Like a Dude"
 * 4) Rihanna : "S&M"
 * 5) Ke$ha : "We R Who We R"
 * 6) The Wanted : "Gold Forever"
 * 7) Matt Cardle : "When We Collide"
 * 8) Take That : "The Flood"
 * 9) Ellie Goulding : "Your Song"
 * 10) JLS feat. Tinie Tempah : "Eyes Wide Shut"
 * 11) David Guetta feat. Rihanna : "Who's That Chick?"
 * 12) Taio Cruz feat. Travie McCoy : "Higher"
 * 13) Chris Brown : "Yeah 3X"
 * 14) Britney Spears : "Hold It Against Me"
 * 15) Alexis Jordan : "Happiness"
 * 16) Parade : "Louder"
 * 17) Olly Murs : "Thinking of Me"
 * 18) Avril Lavigne : "What the Hell"
 * 19) McFly feat. Taio Cruz : "Shine a Light"
 * 20) Noah and the Whale : "L.I.F.E.G.O.E.S.O.N."
 * 21) Comic Relief pts. Susan Boyle & Geraldine McQueen : "I Know Him So Well"

CD 2

 * 1) Jessie J : "Price Tag"
 * 2) Chipmunk feat. Chris Brown : "Champion"
 * 3) Wiz Khalifa : "Black and Yellow"
 * 4) Rihanna feat. Drake  : "What's My Name?"
 * 5) The Black Eyed Peas : "The Time (Dirty Bit)"
 * 6) Nicole Scherzinger : "Poison"
 * 7) Enrique Iglesias feat. Ludacris & DJ Frank E : "Tonight (I'm Lovin' You)"
 * 8) Cee Lo Green feat. Wiz Khalifa : "Bright Lights Bigger City"
 * 9) Katy Perry feat. Kanye West : "E.T."
 * 10) P!nk : "Perfect"
 * 11) Tinie Tempah feat. Ellie Goulding : "Wonderman"
 * 12) Willow : "Whip My Hair"
 * 13) Katy B feat. Ms Dynamite : "Lights On"
 * 14) Martin Solveig feat. Dragonette : "Hello"
 * 15) Flo Rida feat. Akon : "Who Dat Girl"
 * 16) Far East Movement feat. Cataracs & Dev : "Like a G6"
 * 17) Wretch 32 feat. L : "Traktor"
 * 18) Aggro Santos feat. Kimberley Walsh : "Like U Like"
 * 19) Devlin feat. Yasmin : "Runaway"
 * 20) Tinchy Stryder feat. Melanie Fiona : "Let It Rain"
 * 21) Chase & Status feat. Liam Bailey : "Blind Faith"