Big Bang Theory star Kaley Cuoco appeared on week 2 of The Voice support her sister Briana Cuoco, an aspiring singer. Watch.

"The Voice" had stiff competition on Monday, Dec. 3 when the Top 6 finalists performed two songs each for their mentors. Cee Lo Green's act Trevin Hunte was the highlight of the episode. Hunte, 18, received a standing ovation and rave reviews from all four judges for his rendition of "And I Am Telling You" on "The Voice" on Monday. Adam Levine said Hunte had an "incredible, God-given voice" then described his take on the "Dreamgirls" soundtrack song "one of the best performances I've seen on the show, seriously maybe ever."

The Top 8 was announced in "The Voice" after a shocking elimination that sent home one of the season's frontrunners. Sylvia Yacoub and Bryan Keith found themselves leaving the competition after the viewer's votes put them in the bottom two. The departure of Keith was a surprise to the show's host Carson Daly and coaches- Christina Aguilera, Blake Shelton, Adam Levine, and Cee Lo Green. Before the show''s host Carson Daly announced the voters' results, Keith told the crowd, "No matter what happens, I just want to say thanks. I love you guys. Keep rockin'!"

Christina Aguilera has outdone herself again. When Aguilera, 31, came out onstage during a live episode of NBC's "The Voice," she shocked viewers with her pink Afro wig accessorized with a tiara. The petite singer wore the same pink Afro that was a part of her sexy Halloween costume, with an equally attention-getting outfit for her duet with Cee-Lo Greene. Her cleavage spilled out of her print strapless dress with a floor-sweeping train for the live show on Tuesday, Nov. 13. The NBC mentor accented the look with star-spangled earrings, a black fur around her shoulders, and a white lace fan she held as she strut in her crystal-embellished thigh-high boots. The "Voice" judges performed her song "Make The World Move" from her latest seventh studio album, "Lotus." "About to #MakeTheWorldMove with @CeeLoGreen on @NBCTheVoice tonight. You better not miss it!!!" Aguilera tweeted before the show.