So nothing about The Boss? I’m surprised.
I had a chance to see him on The Born in the USA Tour and (again) foolishly didn’t go. Two great ones from that tour:
No idea why this BRILLIANT version of “Sherry Darling” from Philly in 1985 isn’t playing, but hopefully this from 1979 works:
As for moments…Michael Jackson’s first moonwalk is one that changed the music business. You can skip to around 3:30 mins if you don’t want to sing along.
Prince’s guitar solo on “While My guitar gently weeps”
The Pixies “Hey”
Posted above. 
Is that extremely strong support for my post from yesterday - scroll up to #29, or an unintentional reposting of the same video?
Either way, I agree with you!
Oh gosh, unintentional repeat. I knew the backstory, and think this is fabulous. The crowd, Brian May’s delight, Michael’s gorgeous voice…
So about 15 years ago I was in Vegas for the Consumer Electronic Show. I had an AV side business. In the Gibson guitar tent was first Joan Jett. She was fantastic actually but she warming the crowd up for Brian Wilson from the Beach Boys.
It was only like 100 people and he was like 10 feet away. This was when he kinda was just coming back. Him and a piano. He would play and say “You might of heard of this song”… Then play a classic one after another. It’s was truly special and amazing.
Another story was at Chrysler arena at Michigan in like 1981 or so. My GF (now wife) friends worked there and needed volunteers to seat people and you got to see the concert for free for a Billy Joel concert.
So like 30 of us are there a few hours before to get trained. Billy Joel comes out and warms up playing 45 minutes straight of Beatles songs. Christy Brinkley comes out and sits down next to him. Complete ovation from the workers when he was done. I wished I had recorded that moment. Probably one of the best performances I have ever heard was that warm up.
Here’s one from Jefferson Starship. It’s a 1978 rehearsal of “Count on Me”.
I’ve never been a huge fan of * Jefferson * (fill in the *). But this is an absolutely lovely song by the incredible Marty Balin (RIP). For the Bay Area crowd, this was apparently filmed in Marin County. And there is an interesting intro by Suzanne Somers.
Same. Someone may want to do a thread about worst live performances or worst song or worst live performance of the worst song. Here’s my nominee. 
I fear this is quickly going to turn into a national anthem thread. Rosanne, Carl Lewis… the list is long and painful.
In thinking about the national anthem, there is one entry that deserves to be in this thread.
Her performance of “I Will Always Love You” at the 1994 Grammy’s was breathtaking.
Oh, lord…how could you? The humanity…!
Seriously, I cannot understand how this song actually made it to #1 on Billboard’s Hot 100. Truly dreck of the highest magnitude.
This group or its ancestry is a curious one. I once heard Grace Slick’s isolated vocals on “White Rabbit” and she was amazing. They are very hit or miss. And this one missed by a light year.
The Jefferson Airplane are (deservingly in my opinion) in the Rock n’ Roll HOF and some of their songs (White Rabbit, Wooden Ships, Somebody to Love) are classics. They also played at both Woodstock (which was a great live moment in rock history) and Altamont (which was not). The Jefferson Starship had some good songs early on (Miracles, Find Your Way Back), but got pretty bad as the 80’s wore on.
Not sure if this counts…
Speaking of epic fails, Ashlee Simpson on SNL, caught lip sync’ing. A career down the tube.
This was awful. I did like Fab and Rob. But it was humiliating.
Rob Pilatus’ death was terribly sad.
This is how it’s done. She’s up there with Whitney.
Do AGT or Voice or similar talent show performances count? Some are simply amazing.