I would recount The Fray's concert, but I'm way to tired right now. So I'll  just give you a list of bands I want to see live because of reasons.

The Maine
Hurts
Neon Trees
Coldplay
Panic! at the Disco
30 seconds to mars
Avenged Sevenfold (but I'll never get to see Jimmy on the drums, ever...)
Blink 182
The Killers
Muse
Linkin Park
Bombay Bicycle Club
The Cab
Metellica
Incubus
Green Day
Foster The People
Red Hot Chili Peppers
The Script

Nirvana (if the time machine is invented...)