For a track to appear on the 2011 Top 30, it had to be released in this year. This includes covers and remixes. Sometimes the cover or remix of a track is significantly enjoyable enough that it merits mention. Of course, I still hold the original in the highest regard.
However, on the rarest of occasions, the cover can become the Definitive version of the original. Take for instance, Jeff Buckley’s cover of Hallelujah. Most people don’t even know that it’s a cover of a song originally written and recorded by Leonard Cohen. Even fewer people know that Jeff Buckley’s version is based on yet another version performed by John Cale (of the Velvet Underground) in 1991 for a Leonard Cohen tribute album. Still, the version most everyone knows and loves is the version by Jeff Buckley.
My point about all of this is that, if you really appreciate the music you listen to, recognize that sometimes, you must give due credit and respect to those that created it first.
(Mediafire download: http://www.mediafire.com/?r29uqba9du119u4)

