Emma,,,there is a lot of confusion on music rights, lets see if I can make it a little simplier.
There are two seperate rights for any music, one is for the composers, one for the record companies. When you get an ASCAP/BMI/SESAC license (all 3 companies do the same thing,,some composers use ASCAP, others use SESAC OR BMI), you have the composers taken care of,,but then there is the record companies.
If you buy a song on, say itunes, you have the right to listen to it yourself,,that's it,,you can't use in to sync with a video, you can't use it in cheer competition (even if the venue has ASCAP/BMI/SESAC license) This is why you need for buy music from a source such as
MintJam Music: Royalty Free Stock Music (I will make sure its' clear I work for Mint Jam Music) or a mix company that provides you with a mix "ready to go"
There is a LOT of confusion because the rights involving the composers and the music companies are totally seperate (but in some cases one group may own the rights to both,,we have our own writters so we do handle both).
I hope that helps
andy