I haven't been to many concerts... Once when I was still in middle school I saw my favorite Christian singer perform at Silver Springs, FL. Then sometime in highschool I went with a few friends to Atlanta, GA for a concert by Limozeen. Lol they're a fake parody sorta band, but real... Weird, right? Just check here if you want clarification: http://www.hrwiki.org/wiki/Limozeen

Then recently just last year in November I think... Me and Levin went to see Kamelot and Nightwish perform in Downtown Disney in Orlando, FL. That was when Floor Jansen was filling in for Nightwish vocalist. She was actually quite amazing