Paul McCartney: Now and Then

The Beatles are seen during their first U.S. tour in this 1964 file photo. The band members, from left to right, are George Harrison, John Lennon, Ringo Starr and Paul McCartney.

Paul McCartney, one of the two surviving members of the Beatles, returns to the scene of the music group's first American triumph on July 15, 2009. He will appear on "The Late Show With David Letterman," which is taped at New York's Ed Sullivan Theater, where the Beatles made their first American performance in 1964.

In a performance reminiscent of the Beatles' 1969 rooftop concert in London, Paul McCartney, center, performs atop the marquee at the Ed Sullivan Theater in New York, Wednesday, July 15, 2009. Before the outdoor concert, McCartney was interviewed by David Letterman for the "Late Show."

The Beatles perform on "The Ed Sullivan Show" in February of 1964. From left are Paul McCartney, George Harrison and John Lennon, with Ringo Star on drums.

Paul McCartney performs during his headlining set on the first day of the Coachella Valley Music & Arts Festival in Indio, Calif., Friday, April 17, 2009.

The surviving Beatles band members Ringo Starr, right, and Paul McCartney are seen at the launch of The Beatles Rockband Xbox game at the Microsoft Xbox 360 E3 Expo on Monday, June 1, 2009, in Los Angeles.

The Beatles with Ed Sullivan during rehearsal for first American appearance in February of 1964. From left are Ringo Starr, George Harrison, Sullivan, John Lennon and Paul McCartney

Former Beatle George Harrison's son Dhani, left, is joined by Paul McCartney as Harrison's widow Olivia, far right, looks on during a posthumous Hollywood Walk of Fame star dedication for Harrison in Los Angeles, Tuesday, April 14, 2009.

The Beatles perform on "The Ed Sullivan Show" in February of 1964. From left are Paul McCartney, George Harrison and John Lennon, with Ringo Star on drums.

Musicians Paul McCartney, left, and Ringo Starr participate in press conference to promote the "Change Begins Within" benefit concert for the David Lynch Foundation and to support an initiative to teach 1 million at-risk youth to meditate, Friday, April 3, 2009 in New York.

Paul McCartney shows his guitar to variety show host Ed Sullivan during a rehearsal for the Beatles' first American appearance on "The Ed Sullivan Show" in February of 1964. Bandmates John Lennon and Ringo Starr look on.

Paul McCartney performs at the 51st Annual Grammy Awards on Sunday, Feb. 8, 2009, in Los Angeles.

Paul McCartney holds up a copy of "Electric Arguments," a new album re-issued under the name of The Fireman, at a store in central London, Sunday, Dec. 21, 2008.

Sir Paul McCartney leaves the National Magazine Company's 30 Days of Fashion and Beauty viewing of 30 photographs taken by daughter Mary McCartney for London Fashion Week, Sept. 16, 2008.