one's I've been to:

-Judds/Garth Brooks
-Yanni (it was totally AWESOME.. his music is beautiful)
-Snow Jam - Swollen Members, Treble Charger, Bif Naked, Matt Good, ummm.. a bunch more that I can't remember right now..
-Default/Nickleback (GREAT concert)

I think I'm forgetting some.. but if I am, they were boring lame country ones at a fair.

one's I have tickets for:
-Foo Fighters.. it was supposed to be last monday but Dave Grohl lost his voice, so now it's on July 16th
-Summer Sanitarium WOOHOO CAN'T WAIT - Mudvayne, Deftones, Limp Bizkit, Linkin Park and METALLICA!!!!!!!!