"Was she on that show" is not acceptable?
No. That doesnt work. As we have "àquele", it means "a+aquele", we have to use the verb "ir". She was on that show = ela estava naquele show.
That was vicious...
And confusing sometimes.... cause in some "persons" in conjugation they are the same. "Ela foi minha melhor amiga" = she was my best friend.