Brilliant collaborations or sellouts?

Did Eddie or Aerosmith take a risk, giving the illusion of selling out for money and betraying their rock roots or was it a brilliant move to mesh the different music genres together?
Walk this way - Run D.M.C./Aerosmith
http://www.youtube.com/watch?v=NmDzKR7Rfx8
Beat it - Michael Jackson/Eddie Van Halen
http://www.youtube.com/watch?v=Uqxo1SKB0z8
Walk this way - Run D.M.C./Aerosmith
http://www.youtube.com/watch?v=NmDzKR7Rfx8
Beat it - Michael Jackson/Eddie Van Halen
http://www.youtube.com/watch?v=Uqxo1SKB0z8