Here's an article that ties the two together (Deep Purple the band - Deep Purple the song):
http://en.wikipedia.org/wiki/Deep_Purple_(song)
The British rock band Deep Purple got their name from Pete De Rose's hit after guitarist Ritchie Blackmore's grandmother repeatedly asked if they would be performing the song, her personal favourite.

I really liked her arrangement. Yamaha strings sound great. I also agree with the folks that heard an 'organ' technique. I think that also shows on her other entries on PSR-Tutorials.
http://www.psrtutorial.com/song/mp3/index.html Look for Judy Short in the Performer column.
-mike