Briana Cuoco Briana Cuoco

Kaley Cuoco isn't the only talented member of her family. Her younger sister Briana auditioned for The Voice during Monday night's episode.

Briana has served as Kaley's personal assistant and even choreographed last year's awesome Big Bang Theory flashmob in which the cast and crew took on "Call Me Maybe" and other songs during an episode taping. Briana has also guest-starred on The Mentalist, The Newsroom in addition to The Big Bang Theory.

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Check out Briana's successful audition below, in which both Christina Aguilera and Cee Lo Green turn their chairs around. Find out which coach she chose:

The Voice airs Mondays and Tuesdays at 8/7c on NBC.