A jury of 500 artists, critics, performers, etc. at the American Film Institute has voted "Singing In the Rain" the best movie musical ever:

The other top 10 musicals, in descending order, were: West Side Story, The Wizard of Oz, The Sound of Music, Cabaret, Mary Poppins, A Star Is Born, My Fair Lady, An American in Paris and Meet Me in St Louis.

The other films making the list of the best 25 musicals were: The King & I, Chicago, 42nd Street, All that Jazz, Top Hat, Funny Girl, The Band Wagon, Yankee Doodle Dandy, On the Town, Grease, Seven Brides for Seven Brothers, Beauty and the Beast, Guys and Dolls, Showboat and Moulin Rouge.

I think The Band Wagon got shafted.  And I hate My Fair Lady (sorry, Heather!).

By the way, if you’re a "Singing In The Rain" fan, and haven’t seen the VW Golf Gti ad remix of the classic "Singing In The Rain" scene, you’ll enjoy this: