I heard this song once recently on the radio and it was towards the end, so I didn't get a lot of the lyrics... but it went something lik this:

"well I heard your boyfriend, that he has a girlfriend"

I know its not much, but it was a guy singing, and the style was similar to Avril Levigne/Good Charlotte.

Would appreciate it tremendously if anyone could tell me the name of the song and/or band.

Thanks!

It's not an exact lyric match, but this is what came to mind first:

THE KILLERS LYRICS - Somebody Told Me

Thank U So Much... that's Exactly The Song!