Kaley Cuoco's Sister Briana's The Voice Audition: Watch Kaley's Amazing Reaction

Celebrity News Oct. 1, 2013 AT 9:30AM

Kaley Cuoco has more than just an engagement to celebrate these days! Her sister and personal assistant, Briana Cuoco, is now a major contender on this season of The Voice, as revealed on the Monday Sept. 30 episode of the Emmy-winning NBC smash. Watching Briana's audition backstage, the Big Bang Theory actress, 27, nearly stole the show as she and their parents cheered her own and urgently pleaded for the panel of coaches -- Christina Aguilera, Cee Lo, Adam Levine and Blake Shelton -- to press their buttons and select her sibling.

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As Briana impressively crooned Lady Gaga's "You and I," Kaley prayed and yelled for victory -- and it worked! Aguilera was first to press the button and turn around in the iconic red chair, with Cee Lo following suit. As the coaches heaped praise on Briana, Kaley jumped around, hugged her family members and wiped away tears.

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The CBS star spoke about her sister's talent and ambition before the big performance. "I've been waiting for something like this for so long for her. She’s deserved this her whole life and she's always put herself on the back burner for everyone else. And this is her time now," she said.

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"There's no one I love more in the world. My sister and I are closer than close… I want this for her probably more than she maybe wants it. I'm just really, really excited!"

Watch Briana's big moment -- and Kaley the cheerleader! -- now.

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