I've been to a little bit of everything:
Warped Tour: Must've been somewhere around 2003 or 2004 when I went. Basically because I was chasing some tail, and the only bands I cared for were The Offspring, and Dropkick Murphys. Outside of that it was a bunch of emo punk rock bands like My Chemical Romance... Ugh... The things you'll do when you're trying to get the girl.
Christina Aguilera: Not my proudest moment, basically forced to go when I was much much younger at the very starting point of her career. My friends Mom made us go because his sister wanted to see her.
Jason Aldean/Luke Bryant: Seen these guys, not much into the newer Country stuff, but these guys actually put on a pretty good show.
Styx/Foreigner - Styx is OK, they haven't aged as well as Foreigner IMHO. Foreigner puts on a helluva show, high energy, and they sound just as good live as they do on the radio.
Blues Traveler - Awesome show, best so far that I've seen in person. John Popper had a leg injury and was in a cast, despite that, he still puts on a killer performance.
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"Success isn't owned, it's leased and the rent is due every day." - TJ Watt