* Britney Spears: She was on the 1993 revival of the show, and her bubbly personality and dance moves quickly made her a star.
* Christina Aguilera: Another alumna of the 1993 revival, Christina went on to become a powerful vocalist and international pop icon.
* Justin Timberlake: He was part of the "Mickey Mouse Club" in the early 1990s, along with Britney and Christina. He formed NSYNC with some other Mouseketeers and went on to a successful solo career.
* Ryan Gosling: He was also on the 1993 revival and started his acting career on the show. He's now a renowned actor.
* Keri Russell: She starred in the show in the late 1980s and went on to become a successful actress, most notably for her roles in "Felicity" and "The Americans."
So, depending on which singer you are thinking of, there are several who got their big break on The Mickey Mouse Club!