
There are images of Paris on the wall that parody Sanrio's Hello Kitty. :D
Bratz Parody. And note the maker of these dolls:

"moral-less" - should be amoral or immoral.
When men shave their balls it's fine, but when a woman does it she's "straaange." - woman don't normally have balls...
The way Butters apologizes to his mom for dating Paris Hilton shows him to be a pussy indeed. Women are gonna walk all over him when he gets older.
Yes, that is S'mores-flavored Schnapps Paris Hilton is drinking.
As you can see, Cartman is not the class president. :) Wendy has the post in this episode.
Nice bit of role-reversal in having the girls comment on the guys that walk by. :)
Grandpa Stotch was a coal miner.
Wendy's and Bebe's fathers appear.
Blooper: you can see that Mr. Garrison's living room is a cut-away, as the front wall doesn't extend out of camera range, but stops short of the right margin on the screen.
Blooper 2: For a second after Mr. Slave says "People, don't applaud me. I'm a dirty whore," Wendy appears dressed as a dirty whore. The next time the camera is on the crowd, she's dressed normally again.
Mr. Slave is a sicker perv than Mr. Garrison, and he's apparently replaced Big Gay Al as the gayest man on the show. The boys haven't gone to him for help as they have to Al, yet.
The girls played "2 minutes in Heaven." Usually, the game lasts 7 minutes. I don't know if they treat the boys the way they were treated in this episode thought. :D
Token was hit on by the girls appeared at the party flanked by two of them. I guess he and Wendy are through as a couple. :) Short relationship, as would be expected at that age.
Chris asks Butters to dig up $250 million worth of coal, then later on asks him if he dug up the $200 million worth, then holds up a check for $250 million even though he asked for cash upfront from Paris.
Butters sings a paraphrase of "Sixteen Tons" by Tennessee Ernie Ford while digging for coal.
The guy officiating the whore-off looks like Woody Allen.