The Library of Congress is getting funky. The institution just announced the musical selections entering the National Recording Registry this year, and Isaac Hayes' 1971 double-LP soundtrack for Shaft is one of them. The album joins 24 other songs and records from the canon of popular American music that the Library recognizes each year as "important historical treasures." 

Other notable acts include U2's landmark album The Joshua Tree, Jeff Buckley's immortal recording of "Hallelujah," and Creedence Clearwater Revival's patriotism-eviscerating single "Fortunate Son."

"These recordings represent an important part of America’s culture and history," said Librarian James Billington. "As technology continually changes and formats become obsolete, we must ensure that our nation’s aural legacy is protected. The National Recording Registry is at the core of this effort." 

The "Theme from Shaft" single hit No. 1 on the Billboard Hot 100 in November 1971. To be eligible for induction, a recording has to be at least 10 years old. The institution now has 400 recordings in the registry, and rightfully, Shaft is one of them. 

Revisit the classic song below: