Get famous: I heard a rumor that I can host a charity event

My Sim just had this option open. She's a politician and has level 10 Logic and Handiness. So most of her good reputation came from protesting for her cause at a public venue and tutoring others in chess and woodworking at club meetings. (I think helping her kids with their homework might have also counted.) She's only a one star celebrity, so you don't have to be a hugely famous to unlock it.

I haven't tried the event yet, but I'm excited to, as it seems right in character for her so far.