The sample you heard was saying "Feel It", part of a larger sample saying "Can you feel it?" It might be MJ, but it would be from the Jackson 5's "Can You Feel It" rather than "Beat It"
While it was indeed Spikee, you won't be able to buy that particular version of it that you saw, because these manipulations are something they've only been doing to the song live this year, to keep it fresh. The studio version Mike linked is awesome too though.
You can listen to what you heard here:
http://soundcloud.com/borndirty/spik...at-main-square