John Cowsill and The Beach Boys
37th Annual - A Capital Fourth
PBS National Concert
July 4, 2017
The Mall - Washington, D. C.

Below are video captures from the TV airing of the PBS National Concert which the BB's guested on.

The Beach Boys sang - "Surfin' Safari," "Do It Again," "Help Me Rhonda," and "Surfin USA".
John play on the first and last song. He did NOT sing lead on Rhonda.