I'm just going to go ahead and assume I was right. If not, feel free to ignore this post.
I was at a "The Frames" show in San Francisco at The (legendary) Fillmore a few weeks ago, and during one of their songs, everyone was supposed to sing along. I was standing near the front-ish area, and as everyone was singing, The singer stopped, pointed at me and said "I'm not sure if the guy in the (band who performed the song I'm looking for) t-shirt is really singing, or just mouthing-along with the song, but either way, Sir, I respect that you're here." I've never been more embarassed in my life.
Bingo. I don't have the attention span to keep coming back to provide hints or to check up, so mine will always be easy. Only thing, I thought maybe the girl in the photo would have thrown someone off.