It really depends one what you consider famous like take my mother for example she could be considered famous (she is bisexual not acearo but you get the idea) but have you ever heard of a woman that goes by the name Obsi/Obsidian/Obsidian Star? Probably not because you have to be in the right circles. But within those circles my mother could be considered famous even though you've quite possibly never even heard of what makes her "famous"
Also I would totally sing a love song to a lamp. Or food. Or my cat... Or probably just one of my friends, they all know I'm aro and they sing love songs to me all the time even though they are straight as a joke.