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Brand names are fine (as long as you don't libel them). The owners of the brand pay good money for advertising so they don't mind you using them. They do mind if you show them in a bad light.
As NeilMar says, song lyrics are a copyright issue. This is someone's creative work whose purpose is to make them money, same with poetry, same with other people's writing. You get a 'fair use' right to reproduce some portion of a work (in some countries) but when it comes to a song that means about none of it. And music publishers can and do charge big $$ for such use, and sometimes they allow you to do it for free. But you do need to get permission. Mangling the lyrics might work, but I wouldn't try it myself.
Bear in mind you are making use of someone else's creative work here. So you need them to be happy that you're doing it. You'd want the same treatment if it were the other way around.
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