Masterpieces is a compilation album by American singer-songwriter Bob Dylan, released on March 12, 1978 by CBS. The triple LP set was released in Japan, Australia and New Zealand in anticipation of his 1978 tour. Primarily a greatest hits collection spanning Dylan's career up to that point, the album features one previously unreleased track, a unique (1962) outtake version of "Mixed-Up Confusion". It also includes a live performance of "Just Like Tom Thumb's Blues" from Dylan's 1966 World Tour, which was first released as the B-side of his "I Want You" single in 1966. Masterpieces was reissued on CD in 1991 by Columbia, but is no longer in print.

"Just Like Tom Thumb's Blues" is a song written and performed by Bob Dylan. It was originally recorded on August 2, 1965, and released on the album Highway 61 Revisited. The song was later released on the compilation album Bob Dylan's Greatest Hits Vol. II and as two separate live versions recorded at concerts in 1966: the first of which appeared on the B-side of Dylan's "I Want You" single, with the second being released on The Bootleg Series Vol. 4: Bob Dylan Live 1966, The "Royal Albert Hall" Concert. The song has been covered by many artists, including Gordon Lightfoot, Cat Power, Nina Simone, Barry McGuire, Judy Collins, Frankie Miller, Linda Ronstadt, the Grateful Dead, Neil Young, The Black Crowes, Townes Van Zandt, and Bryan Ferry. Lightfoot's version was recorded only weeks after Dylan's original had been released and reached #3 on the Canadian RPM singles chart.