Quote from Rachel in The One with the Baby on the Bus
Phoebe: But it's not even that, you know? I used to do my songs because it made me happy. Now it's just all about the money, you know? Rachel: Well, people missed you in there. In fact, there was actually a request for "Smelly Cat." Phoebe: Really? From who? Rachel: Well, me. And I know it's not your, you know, big money song, but it's my favorite.