Yeah so I never had a problem with my iTunes not being random enough for me, but I figured, any extra randomness is fine by me, so I slid the slider to "Less Likely" as in Less Likely will multiple songs from the same artist show up when you shuffle, and then I reshuffled my Party Shuffle:
Yeah now everytime I shuffle all I get is Michael Bublé! I've RUINED my iTunes' randomness...Well ya know what they say? I donno either but it's something like leaving well enough ya don't fix it or something...