Worst songs ever? (Including covers)

Nu Metal wasn't that band.

People slowly disliked it only when it started to become too mainstream and generic.

Still, for its time, it was a step forward from Grunge rock.

Worsts songs from a genre (for me) are from Polka and Country.

I've no idea what one should call the worst song of all time, nor how to quantify that, but my least favourite song, one which I hate with a passion, has to be the complete bastardisation of Desolation Row by My Chemical Romance, as they both raped the music and the meaning, making it into some kind of juvenile anarchist anthem. Peter Gabriel's version of Street Spirit is comically bad, too.