Your first reaction to some video montages may be, "Someone had too much time on their hands…" But after watching this one, you'll be glad they put in the effort.

This amazing video pairs clips from a parade of old Hollywood musicals with matching beats from Mark Ronson and Bruno Mars's "Uptown Funk," so seamlessly, you'll swear the hit song had to have been featured in "Singing in the Rain."

Fred Astaire, Ginger Rogers and Gene Kelly are among the dozens of dancers who are spinning and tapping in perfect time with the modern groove.

The four people behind Nerd Fest UK plowed through hundreds of hours of classic movies to find just the right moves for the music. One of their members, Michael Binder, has written a book about film preservation and the group features links under this YouTube post asking others to donate to the cause.

This video may well revive a lot of old cinema, if younger generations are sufficiently moved by the moves.

(WATCH the video below)

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