The Spice Girls said they were "excited, humbled and proud" to be at the musical inspired by their music Viva Forever!
The singers also praised the writer Jennifer Saunders as well as the cast of the musical.
More top news
The incoming White House press secretary has said Donald Trump's speech is going to be "less of an agenda."
Donald Trump is set to be sworn in as the 45th President of the United States but major questions still remain over his team.
Ana-Alecia Ayala became an internet sensation for her video showing her dancing and laughing through intensive chemo treatment.