Can't find this classic rock song and it's killing me.
 

I really need help to identify a song I heard 2 weeks ago. I don't remember any lyrics whatsoever, just the tune. It's a classic rock song that lots of people knew when it was playing, but everybody I hum the rhythm to doesn't know it. The singing and possibly guitar is done by a guy with shoulder length black hair who is possibly wearing a Hawaiian style button up flower t shirt. I have no idea what the chorus said, but the closest I can come to what I heard through text is "Too la roo la too la roo DA YOOOO". Yeah, I sound like a complete idiot, and I have barely any info about the song. It's killing me that I don't know it though, and if somebody could actually identify it by this garbage amount of info I've given I would be extremely grateful. Thanks so much.

Almost sounds like Come on Eileen by Dexy's Midnight Runners.

This IS NOT classic rock.

I know, but it was the OP's description.

He wasn't responding to you.