A band that's really making me bob my head and sing along in my wonderful off-key cambiada is O.A.R. Sweet malarky, this band is AWESOME!!!!
As for awesome concerts that I've been to, nothing beats Green Day. That was without a doubt the best show I've ever seen. Blink182 played with them and I considered them the cool-down band. The only thing Blink did to even come close to comparing with Green Day was when Travis Barker's (drummer) drum platform raised into the air and over the crowd and then spun him upside down in two direction while he soloed around fireworks. Other than that, Green Day just killed. They were awesome.