Conversation so far:
What is the Timbiriche Era?
In 1986, after the departure of Sasha Sokol from Timbiriche, Thalia became a member of the band.
Is Timbiriche Thalia's first band?
In 1981, when Thalia was nine years old, she was incorporated as a vocalist in a children's group named Pac Man.

Question: How long was Thalia with Pac Man?
Self-contained rewrite: How long was Thalia with Pac Man?