Andrea Bocelli. I used to think he was lame or something because my mom liked him. Luckily I've matured since then
UnderOath. I kept hearing so many different opinions. Either "They suck, just some screamo band" or "They rule, best band xXEVARXx lolz" but I've formulated my own opinion: They're pretty epic.
Lady GaGa. She's a disease, and even I'm not safe!
There's so many I can barely just think of more than a few examples really(seeing as I've acquired most of my favorite bands this way!), but Bocelli, GaGa, and the 'Oath comes to mind. Any takers?