George Michael and McCartney duet

A previously unreleased duet between George Michael and Sir Paul McCartney is to feature on a series of upcoming greatest hits packages.

Michael's "Twenty Five" collections are scheduled to come out in November, in the form of two and three disc compilations.

Three new tracks will feature on the two CD release, including the Macca track, "Hear The Pain", plus "An Easier Affair" and "This Is Not Real Love", featuring former Sugababe Mutya.

A fourth song, "Understand", will only come out on the three CD compilation, while hits from across Michael's Wham! and solo career make up each edition.

George Michael began a full European tour in Barcelona on Saturday, playing his first series of live shows in 15 years.

The individual tracklisting for "Twenty Five", according to Billboard, is as follows:

One

"Everything She Wants" (Wham!)
"Wake Me Up Before You Go-Go" (Wham!)
"Freedom" (Wham!)
"Faith"
"Too Funky"
"Fastlove"
"Freedom '90"
"Spinning the Wheel"
"Outside"
"As" with Mary J. Blige
"Freeek! (Not 04)"
"Shoot the Dog"
"Amazing"
"Flawless" (radio edition)
"An Easier Affair"

Two

"Careless Whisper"
"Last Christmas" (Wham!)
"A Different Corner"
"Father Figure"
"One More Try"
"Praying for Time"
"Heal the Pain" (feat Paul McCartney)
"Don't Let the Sun Go Down on Me" (feat Elton John)
"Jesus to a Child"
"Older"
"Round Here"
"You Have Been Loved"
"John and Elvis Are Dead"
"This Is Not Real Love" (feat Mutya)

Three

"Understand"
"Precious Box"
"Roxanne"
"Fantasy"
"Cars and Trains"
"Patience"
"You Know That I Want To"
"My Brother Had a Brother"
"If You Were There" (Wham!)
"Safe"
"American Angel"
"My Baby Just Cares for Me"
"Brother Can You Spare a Dime?" (feat Pavarotti & Friends)
"Please Send Me Someone (Anselmo's Song)"
"Through"

The "Twenty Five" compilations are due for release on November 15.document.write(unescape("