I don't know why it is so hard for you guys to become celebrities, I tend to have the opposite problem. My Sim be befriending celebrities like its nothing. Then her reputation gets tarnished and her mood nosedives because whenever I forget to pay the bills and the repoman comes it goes into the tabloids

My Sim has an illegitimate child it goes into the tabloids

Then you have people spreading false rumors about you so you have to take them to court
I hated being a celebrity, its one of the main reasons why I stopped living in that downtown neighborhood they provided.