Your first concert was to see who and when?

Lynyrd Skynryrd Capital Theater Passaic NJ 1976. Warm up bands 38 Special and Atlanta Rhythm Section.

I had tickets for Madison Square Garden in 1977 but the plane went down after the 4th show of that tour.

I also grew up in Detroit and attended UM .  Not sure it qualifies but Bob Seger played a short set at a Bar Mitzvah in 1971.  He must have been down on his luck and he subsequently hit it big a few years later.  I had gotten into Classical Music in HS and saw the DDO a bunch of times but my first pop concert was at Meadowbrook with the Temptations, probably 1974, and no doubt not anything close to the original lineup.  The one I remember most was first week of college 1976 and the Eagles at Crisler Arena with Hotel California tour.  The week before Gerald Ford had kicked off his election campaign at Crisler and the UM Marching Band played the Victors (Ford had captained the football team ) and it was a political ruckus that ensued.

Elton John Bicentennial tour MSG. With Kiki Dee. I think he made his entrance rising up as the Statue of Liberty or I'm having a fever dream.

Aerosmith at the old Boston Garden in 1977... was a Junior in HS

Neil Young & The International Harvester’s with Kris Kristofferson as the opening act. Toronto, Ontario Aug. 1985. CNE Grandstand inside Exhibition Stadium. I was 15 1/2 yrs. old. First time I smoked a joint too ! 
 

Great night still burned into my brain.