Pink & Alicia Keys
Pink & Kelly Clarkson
Carrie Underwood & Shania Twain
Justin Timberlake, Prince & Michael Jackson
Janet Jackson & Beyonce
Jay-Z & Kanye West (not sure if this happened cuz i don't really listen to either much but would love to a single collaboration!)
Eminem & Kanye West
Britney Spears & Sean Paul
Britney Spears & Ludacris
Nelly Furtado, Shakira & Daddy Yankee
Shakira & Britney
Linkin Park & Kanye West
Madonna, Coldplay, William Orbit (it would sound like Ray of Light but with a Coldplay twist, amazing!)
Alicia Keys & Mariah Carey
Kelly Rowland & Andre 3000 of Outkast
Jewel & Bjork
Pink & Missy Elliott (i love her pop-rock sound, but it would be interesting if she did an R&B influenced pop song with Missy)
Leona Lewis & Usher
Leona Lewis, Alicia Keys & Chris Brown (This would be HOTT)
Leona Lewis & Justin Timberlake
Mariah Carey & Chris Brown
Justin Timberlake & Shayne Ward
Enrique & Duffy (LOL random)
Christina Aguilera & Mariah Carey
Fergie & Shakira
^ No affence, because I actually like you But it's not surprise at how many Leona collabrations you have, thought the Leona, Alicia & Chris one would be absouletely fantastic!
Britney Spears ft. Jennifer Love Hewitt
Mariah Carey ft. Christina Aguilera
Shakira ft. Jennifer Lopez
Britney Spears ft. Usher
Rihanna ft. Beyoncé
Mariah Carey ft. Mika
Nelly Furtado ft. Ashlee Simpson
Jessica Simpson ft. Ashlee Simpson
Jessica Simpson ft. Britney Spears