Stevie Wonder Rocks L.A. City Hall with 'Purple Rain'

Stevie Wonder brought down L.A. City Hall Friday, but not because of pothole issues ... he headlined a City of Angels tribute to Prince.

At least 5,000 fans joined Stevie for an awesome rendition of "Purple Rain." Lots of singers joined, including Faith Evans, Eric Benet, Aloe Blacc, Deitrick Haddon and Sebu Simonian.