I find the "Barbie Song" by Aqua to be 100 times more obnoxious than Barney. I'm sure there are others.
Edit: BTW someone recently posted the worst songs of all time -- "Ackey Brakey" was the polled #1 worst song of all time. That might work as well.
Edit: BTW someone recently posted the worst songs of all time -- "Ackey Brakey" was the polled #1 worst song of all time. That might work as well.