Your first concert was to see who and when?

Three Dog Night at the Sioux Falls Arena.  My oldest brother and girlfriend took us three siblings of which I was the youngest - aged 12. 

Cheap Trick, year 19-whatever 

The mighty Led Zeppelin at MSG June 1977. I was 15 and it was great. 

Creedence Clearwater Revival, with The Ike and Tina Turner Review opening for them. May 22, 1970. Salt Palace Arena, Salt Lake City. I was 14 years old. I lived in a small rural town about an hour's drive away. My older sister drove me and my friends into the city and waited outside while we saw the show.

Steely Dan, August 17th, 1973, Municipal Auditorium, Topeka Kansas.

Beach Boys with Maharishi Mahesh Yogi May 3rd 1968 Washington Coliseum

Pink Floyd: Dark Side of the Moon tour in Pittsburgh in 1975. Also saw Bob Marleys last concert at Stanley Theatre in Pittsburgh in 1980.

AC/DC, Thin Lizzy and The Dictators at The Aragon Ballroom in Chicago. 1978 I believe.