Big fat tips from successful musicians, or from celebrities of any kind, are flattering and useful compliments for any street performer.

Years ago (early 70s), singing on streetcorners in the Fisherman's Wharf area in San Francisco, I had two such experiences.

A nice long listen, stopping in his tracks, plus a couple of bucks, from Boz Scaggs; and

A ten-dollar bill (biggest donation ever!) from comic/actor Red Skelton as he was exiting the Buena Vista restaurant/bar.