Deciding that she didn't want to be overshadowed by Britney Spears, Alicia Silverstone has pulled out from her guest appearance on How I Met Your Mother.
Britney Spears will be playing a dermatologist's assistant and Silverstone was to be the dermatologist.
Silverstone's role will be taken over by Sarah Chalke from Scrubs and has been scaled back to only one episode.
Open Question: What else did Alicia Silverstone have to do?
Source: DListed via Pink is the New Blog