Personally I couldn't give a **** if GaGa's performance "hurts the song" on the charts. I for one will enjoy watching that performance for years to come. Far, far more important than a chart position.
Now, like it or not, I think Jo will be remembered. Not as much as the meat dress, but it's definitely gonna be a topic of discussion in the following days among the non-Gaga fans (waiting for the Gaga is man jokes to start again...).
, but I'm not sure how the public will react 
