Celine Dion and Frank Sinatra – "All the Way," Celine Dion's duet with Frank Sinatra, appeared on the Canadian singer's 1999 album "All the Way ... A Decade of Song." Dion is shown here performing the song during her Las Vegas show in 2006. (Sinatra recorded the tune in 1957.)
Lisa Marie Presley and Elvis Presley – Lisa Marie Presley sang "In the Ghetto" alongside her late father's vocals to commemorate the 30th anniversary of his death in 2007. Elvis Presley popularized the song in 1969.
Natalie Cole and Nat King Cole – Singer-songwriter Natalie Cole released several duets with her father, jazz legend Nat King Cole. She cleaned up at the Grammy Awards in 1992 thanks to her version of "Unforgettable" -- the song her father popularized in the '50s.
The Beatles – In 1995, Paul McCartney, George Harrison and Ringo Starr released "Free as a Bird," featuring John Lennon's vocals thanks to Yoko Ono, who supplied the men with unreleased material by her late husband.