hey, thanks everyone for the welcomes! nice friendly forum you got here...
so it seems i missed a few blatantly obvious ones, but i guess that was the purpose of the thread in the first place. can't believe i missed the "Business Time"/Barry White connection, i guess cos Jemaine doesn't do The Voice - but all the oohs + aw yeahs, plus the whole sexy-speak verse/singy chorus structure, definitely Barry White there.
hadn't heard that R Kelly/Usher tune before, but that's definitely where "Both In Love..." comes from - did i imagine the "stop the track!" bit in "Trapped In The Closet" then? did look it up on youtube but there's 22 parts to it so for my own sanity's sake i couldn't endure it all (hilarious as it is). i'm sure i've heard someone saying "stop the track!" like that somewhere before anyway...
those Youtube comparisons vids were ace, would have saved me a bit of thinking time if i'd seen them before (original list was just of the top of my head - maybe a small amount of research would have helped

)! seem to tally mostly with what i got - don't necessarily agree with all of them mind, some seem to be more like the video is the parody rather than the song (eg, "Hurt Feelings" doesn't sound like Biz Markie at all, but the bit where they're at the harpsichord with the powdered wigs is obviously inspired by the bit in the "Just A Friend" vid). and as people have said, "Love Is A Weapon Of Choice" (why is that not on the new album??) sounds much more Meatloaf than Bonnie Tyler, but i guess the video does look a bit like "Total Eclipse..." i don't really think "Boom" is inspired by that Black Eyed Peas song either, rather they're both just doing a take on Jamaican dancehall. "Demon Woman" / "Devil Woman" - i really should have spotted that one...
also, on a very geeky tip, for "H vs R", they said "early 90s hip-hop" while playing Beastie Boys "Intergalactic" which came out in 1998 - slight fail!