Watch scene selections from Tony Bennett's musical collaborations for Duets II.

Tony Bennett talks about collaborating with Lady Gaga, Queen Latifah, Andrea Bocelli, Michael Buble, Willie Nelson, Amy Winehouse, and others.

Bill Murray, dressed as Elvis, introduces John Mayer Trio for Eric Clapton Crossroads.

Watch Jackie Evancho perform Sarah McLahlan's song "Angel" with David Foster on piano.

Bill Murray hosts a two hour program of highlights from the marathon event, an 11-hour celebration of the six-string that attracted a sold-out crowd of more than 27,000 music fans to Chicago’s Toyota Park.

Watch Billy Joel perform this hit from his 1973 seminal album Piano Man live at Shea Stadium.

Watch Billy Joel perform his classic hit during one of the last concerts at Shea Stadium.

Watch these two pop icons perform Seal's 1991 hit single.

See highlights from the show, including clips of Chaka Kahn, Seal, Donna Summer, America’s Got Talent sensation Jackie Evancho, Natalie Cole, Charice, and more.

To mark the 50th anniversary of Motown Records, Great Performances captures Grammy Award-winning artist Stevie Wonder in his first concert performance recorded for television.