I really can not list all the shows I went to. A lot of the artsits I've seen more than once. Some of them include:
30 Seconds to Mars
Ok Go
Destiny's Child
Backstreet Boys
Beach boys
Papa Roach
Keane
Switchfoot
Trust Co
Taproot
Against Me!
Rise Against
Defiance Ohio
Atryu
One Man's Opinion
Our Lady Peace
Billy Talent
Anberlin
The Color Fred
10 years
Hinder
Blink 182
The Get up Kids
My Chemical Romance
The Used
Alexisonfire
Angels and Airwaves
B 52's
Thrice
Avenged Sevenfold
Aphasia
Blindside
Trapt
Brand New
Taking Back Sunday
Hawthorne Heights
Cauterize
The Smash up
Love Hate Hero
Green Day
Chevelle
Cold
Crossefade
Dashboard Confessional
Evan's Blue
Fall out boy
Finger Eleven
Mudvayne
Nickleback
Hoobastank
Three Days Grace
Innerpartysystem
Jimmy Eat World
Korn
Saving Alexsandra
Linkin Park
Lostprophets
Nine Inch Nails
Love Arcade
Mae
Paramore
Matchbook Romance
Shinedown
Katy Pary (before anyone knew who she was)
Senses Fail
Smile Empty Soul
Social Code
The Drop Kick Murphys
Story Of the Year
Yellowcard
Social Distortion
The Academy is...
The Killers
The Subways
Thursday

I know there's more but that's all I can think of right now.