Give a stream of consciousness and then the final answer. Stevie Nicks re-recorded an acoustic version of her Fleetwood Mac hit Gypsy to serve as the show's theme song. On August 11, 2017, the show was cancelled after one season.

Based on this passage, who sings the theme song for the show gypsy?
To answer this question, we should know that: Stevie Nicks re-recorded an acoustic version of her Fleetwood Mac hit Gypsy to serve as the show's theme song.
So, the final answer is Stevie Nicks.