I know there are a lot of music apps out there, a few apps I have include: Pandora, Spotify, and Songza. My favorite by far is Pandora, although if I had a preimum Spotify, I would consider that a favorite instead. (The 24 free trail was nice must I say, and I did have the option to continue it for 30 days, but I choose not too, because I didn't see the need in a service that I wasn't willing to pay a monthly fee for.) 

I know a lot of these music apps run advertisements and rarely have I gone across a beauty-related ad, why do you guys think this is the case? Are beauty and music just totally unrelated?