From the 1972 British LP On Air -- although the songs themselves were recorded, almost certainly, in 1960 -- please behold in breathless wonder actual pretty good quality live recordings of the incredibly great Eddie Cochran performing in front of a live teen scream audience.
With the immortal "Summertime Blues"....
...and (the to my ears, sometimes, even better)"C'Mon Everybody."
Those were recorded in England, of course (where Cochran was a much bigger star than he was in the States) and presumably on that last 1960 tour just before his tragic death in the same car crash that crippled Gene Vincent. I should add that just about every subsequently famous aspiring British guitar player followed Cochran around on that tour, including a teenaged George Harrison.
I really think Cochran was potentially the greatest and most innovative of them all, and that includes Buddy Holly (who was, admittedly, more prolific). In any case, I hadn't heard those two tracks until last week when my chum Allan Rosenberg played them on his intertube radio show and blew my tiny mind. I mean, this stuff achieves heavyosity, and this is in 1960, fercrissakes.
Incidentally, all four hours of said show are now archived and available for streaming over here at HERE; scroll down and click on the link for Lost at Sea episodes 8/19/14 and 8/19/20.
A real cool time is guaranteed for all.