Big Star was a power pop band out of Memphis, TN that, in its first incarnation, put out two albums, #1 Record and Radio City, that are true classics and influenced a zillion bands that you're more likely to have heard of. Formed by Alex Chilton (of Box Tops/The Letter fame), Chris Bell, Jody Stephens and Andy Hummel, that incarnation didn't last long, but boy were they great. Absolutely essential listening.
I also strongly recommend the documentary, "Big Star: Nothing Can Hurt Me". Beautiful.