To celebrate the musical, Playbill.com has collected videos from various productions of A Chorus Line and stand-out songs from the Marvin Hamlisch-Ed Kleban score.

The original cast of A Chorus Line performs "One."

The commercial for the original production.

A Chorus Line - Broadway 3,389th performance finale.

Clips and history of the original production.

A rare look at Kelly Bishop performing "At the Ballet" in 1983.

Donna McKechnie performs "The Music and the Mirror."

The cast of the Broadway revival of A Chorus Line performs on the Tony Awards.

"What I Did For Love" – Idina Menzel and Marvin Hamlisch:

Original cast members from A Chorus Line perform on "The Donahue Show." Here's "At the Ballet."

Priscilla Lopez sings "What I Did for Love" on "The Donahue Show."

Shirley Bassey performs "What I Did for Love."

Click this link to watch Eydie Gorme perform "What I Did for Love."

A tribute to Michael Bennett, where we see Donna McKechnie's fantastic "Music and the Mirror."

Adam Pascal singing "What I Did For Love" from A Chorus Line:

Watch the opening night curtain of A Chorus Line at Paper Mill:

Baryshnikov on Broadway - "One."

The Chorus Line revival performs on "Dancing With the Stars."

The finale of the original Broadway production of A Chorus Line's 3,389th performance.

Aretha Franklin - "What I Did for Love."

Jessica Simpson performs "Music and the Mirror":

Linda Eder - "What I Did for Love."

The "Glee" cast sings "What I Did for Love."

Grace Jones does a groovy "What I Did for Love."