[Hypnotic2010]

I think there is a legality issue in doing that and that is why they dont play the exact song your looking for.

Q: Can I hear a specific song right away? Can I hear only one artist on a station? Can I create a playlist of specific songs or artists? Can I rewind or replay a song?

Our music licenses do not allow us to play a specific song immediately, or "on demand."
We cannot play more than four songs by an artist in a three-hour period, and each artist may play even less often than that. Also, our music licenses do not permit limiting a Pandora station to only certain songs or artists: we must include other similar songs and artists on each Pandora station.
Finally, you cannot rewind, or immediately replay, any song played by Pandora.
On the plus side, these very restrictions have helped shape what we believe to be one of the finest music discovery and exploration services in existence.