Glen Campbell is dead at age 81.

Did you know about his association with the Beach Boys? From his New York Times obit (my emphasis):

But his skills eventually took him into the recording studios as a session musician, and for six years he provided accompaniment for a host of famous artists, including Frank Sinatra, Dean Martin, Nat King Cole, Elvis Presley, Rick Nelson and groups like the Beach Boys and the Mamas and the Papas.

After playing on many Beach Boys sessions, Mr. Campbell became a touring member of the band in late 1964, when its leader, Brian Wilson, decided to leave the road to concentrate on writing and recording. He remained a Beach Boy into the first few months of 1965.