Just saw a great Busby Berkeley number in the movie Footlight Parade. It doesn't approach the dizzying heights of lunacy that his best numbers reach. (like the waterfall number coming up in this very movie, I can't wait!) But it does have dozens of women dressed like alley cats, Ruby Keeler vomited out the mouth of a giant clown face (? not actually sure what was happening there), and Billy Barty as a mischievous rat.
The embed feature is turned off in the video for some reason, so here's a link to Sittin' on a Backyard Fence.