That person it's right. It's called cross promotion I believe. When an artist promotes something, they're not just promoting the product, but their brand as well.
I mean, not really, but I guess you could look at it that way. I've purchased fragrances by Britney, Beyonce and Rihanna and also own their albums, but I didn't buy their albums because of their perfumes. In fact, I only bought their perfumes because I like their music. So, it's kind of backwards logic.