Lol, I'm a U2 fan and even I was laughing at that article!
As for the worst song, anything by Outkast or Usher. I hate those two with a passion. I'm sick to death of Nickelback, too. So I guess "Hey Ya" and "Yeah" are the two worst songs. That "Roses" song sucks, too. And all of Usher's "confessions" songs, too.