btw: if you end up thinking Jason (pre2009) is literally the most awesomely awesome thing in the world, ever... literally - then you might like to seek out: "CRYSTAL LAKE MEMORIES - the Computer History of Friday The 13th" (not including 2009 dumpfest). It's by Peter M. Bracke and Tital Books. And it is a beast of a book - easily usable to squish small puppies. Cover price has it at £35 but I eBayed my copy for ~£10 (much to my joy and the sellers 1/joy).
Probably the most slept-on Apatow movie, but it's easily my favorite. The movie is just great and for their jokey nature, the songs are surprisingly well-written. And the all-star version of the title track is amazing.