The poisons: Fex-M3 is from the Star Wars extended universe, Meta-cyanide is from Dune, and Tiberium is from Command and Conquer.
It should be "Haus of Gaga."
It should be eins, which means 1.
The woman in this scene gets her ass slapped by Tyrese and says "One Piece," which refers to a popular Japanese anime.
This is apparently Alektra Blue, she's a porn star.
Not really hidden, but awesome.
Scrolling at the bottom of the screen are the lyrics to "Telephone" in Swedish.
One of the security guards is Ms. Mann from Scary Movie.