what alternative song is this?

the only lyrics i can remember are "ooo oooo im not a baby no more
(anymore?)"

its stuck in my head! the song has been playing pretty frequently on
the sirius channel Altnation, so I think its a relatively new song.
the voice singing those lyrics is kind of high.

thats about all i can remember! but if i could get a song title that
would be great! those lyrics have been stuck in my head all day and
its really irritating me that I don't know what song they belong too!

thanks!