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Sheila E. drum solo from Sign O the Times (1987)
While Prince's most famous cinematic moments will forever be ranked 1: Purple Rain, 2: "Bat-Dance", 3: The dead guy in a field in Fargo (not really, but one of the funniest Coen Brothers jokes ever), 1987's Sign O' the Times is the only one to catch him in apex live performance. It captures the ambitious double album its named for as a whole, but is probably most most famous for the extended drum solo by Seila E. embedded above. It is foxy, endless.
Siskel & Ebert on Sign O' the Times
Siskel and Ebert were fans at the time, with the late Mr. Siskel openly begging for Chicago tickets to Prince's next show.