Dude, get copyrighted music OUT of your content. Even 1 second doesn't count as fair use. That's a big myth. All it takes is one snitch to get a cease and desist sent your way. Know the law:
http://www.law.cornell.edu/uscode/17/504.html
I buy royalty free music that I can use as many times as I want from a site called Shockwave-Sound.com. Love 'em.
Here's a trailer I have with weird ass music in it from them:
http://realdollsex.com/images/traile...ealdoll-v1.wmv