IMO, if an artist is 'good' and original, he doesn't 'sell out' just because he does things to earn money. It's when an artist does things ONLY to get money (and this usually means loosing the orginality, and often lack of hard work put in to the music), that he sells out. So if The Roots does a Dr Pepper commercial they still have that talent and can still be original...
uh.. wtf I'm I talking about
All right now, son, I want you to get a good night's rest. And remember, I could murder you while you sleep.
Hey son, I bought you a puppy today after work. But then I killed it and ate it! Hahah, I´m just kidding. I would never buy you a puppy.
"Three witches watch three Swatch watches. Which witch watch which Swatch watch?"
"Three switched witches watch three Swatch watch switches. Which switched witch watch which Swatch watch switch?."