Aerosmith is performing somewhere on the streets of Boston on November 5th. . . but they're not saying WHERE. All I know is that they said they’re going to show up "somewhere in the city" around noon, and "play on the streets." Impromptu performances like this can go either way. Check out this good one I found from a surprise appearance at a Andy Hilfiger birthday party / launch party last year. Steven Tyler just showed up and did a couple of tunes (see the video here)