I think you're confusing two different things. The Devil Wears Prada is a 2006 comedy-drama film starring Meryl Streep and Anne Hathaway, based on the novel by Lauren Weisberger. It's about a young journalist who lands a job at a prestigious magazine, and her demanding boss.
Ariana Grande is a popular singer and actress who has been in various projects, but I couldn't find any connection between her and a sequel to The Devil Wears Prada film.
However, there is a sequel to the novel, "Revenge Wears Prada: The Devil Returns," by Lauren Weisberger, which was published in 2013. This book follows Andy Sachs, the main character from the first novel, as she navigates her personal and professional life.
If you're thinking of a musical or stage adaptation of The Devil Wears Prada, I found that there are reports of a musical in development, but I couldn't find any information about Ariana Grande being involved in it.
If you could provide more context or clarify what you're looking for, I'll be happy to try and help.
