Emma Hunton left Wicked?
Jemma Rix in the Australian production generally does 6 out of 8 shows a week. It isn't set in stone as to when her alternate goes on, but it's generally Wednesday matinee, and one of the Sunday shows. This is a good example of how only doing six a week instead of 8 is better for the voice. Jemma hardly misses a show and has been playing the role almost non-stop for about seven years.