The only song I recognized was a snippet of "Shook Ones" by Mobb Deep in the 4th clip. The others sound very familiar, but it's hard to tell by just the beat.

They have degrees in Alcoholic Anonymous?

^I think some could argue that point, yes.

UNK1 - "Pump It Up" by Joe Budden
http://www.youtube.com/watch?v=wQz4iBjpzZ0

UNK2 - Sounds alot like a Ciara track but the sample is too short, its definitely got Lil' Jon signature beats so it could be any of his affiliated productions but this has Ciara written all over it. Would need to hear more.

UNK3 - This just screams Lil' Jon to me, something with East Side Boys, it sounds alot like "Damn" but not.
http://www.youtube.com/watch?v=8uOseeYbAcY

UNK4 - "This Is Why Am Hot" by Mims
http://www.youtube.com/watch?v=ZwLmDTEVKv0

UNK5 - "The Whisper Song" - The Ying Yang Twins.
http://www.youtube.com/watch?v=gDOC7JRDzYI

^Farhad, you're my heeeeeero. (Sorry, had to throw the Ferris reference in there)

Awesome!!! Thank you, thank you, thank you. Those were driving me nuts.