Well she’s Mary Freaking Poppins, so of course she’s going do good work!
Being that this is Vincent Price, the recipe might include eye of newt. 
This is why it’s deceptive to talk about much of this cross-profession stuff for celebrities. Many musicians have done some acting and many actors have tried music. Some were actually good, but most weren’t. Some of the children’s books by actors are good, but most aren’t. And what about the George Foreman grill? Is that a shrewd business decision by Foreman to endorse a wildly successful product or merely a lucky guess? Some of the actors who went into politics are, in my opinion, merely people good at reading speeches written by other people who really controlled their policies.
There was another Austrian politician that liked to paint water colours, but his name escapes me.
other than that:
Rolf Harris : comedian, artist, musician, singer, songwriter and Olympic medalist swimmer.
Lots of British comedians got their start in the Cambridge Footlights, while training for other careers. John Cleese is a lawyer. Jonathan Miller is a doctor. Hugh Laurie was on the Boat Race crew.
True about Madonna, but Fred Gwynne wrote a dozen children’s books – and illustrated them, too. They still in print, as a matter of fact. He deserves full credit.
Dick DeBartolo, one of Mad Magazines top writers in the 60s and 70s, had a day job writing questions for “The Match Game.”
Fans of the Leisure Suit Larry series of computer games (not to mention Freddy Pharkas: Frontier Pharmacist) will remember Al Lowe, the creator of said games. He was a high school band director for many years before becoming a programmer. He composed the music for the original Leisure Suit Larry himself.
Don’t forget Ron Jeremy, who was a special education teacher before he got into porn.
I think there are threads between occupations…it’s not too different being on stage as a musician, actor, politician or teacher. I also think that if someone is outgoing and well-spoken enough to be an actor, that skill itself can get you places in many jobs (even though it might be just BS).
This isn’t really a career or even a skill, but since his father’s death Christopher Guest has been a baron. The Fifth Baron Haden-Guest of Saling, to be precise.
That makes Jamie Lee Curtis a baroness, Lady Haden-Guest. Of course, she was already The Scream Queen and queen ranks baroness any day of the week.