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Actress Pauley Perrette appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles. The show airs on Aug. 18.
Kevin Winter/Getty Images
Musician Dierks Bentley performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer/songwriter Garth Brooks performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer/songwriter Josh Groban performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer/songwriter Josh Groban performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Actress Viola Davis appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Musician Dierks Bentley performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Actor Josh Hutcherson appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer/songwriter Josh Groban performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Actor Joe Mantegna appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer Nate Ruess of fun. performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Actress Pauley Perrette appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter/Getty Images
Singer/songwriter Garth Brooks performs at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
Kevin Winter
Actress/singer Miranda Cosgrove appears onstage at CBS' "Teachers Rock" special live concert at the Nokia Theatre L.A. Live on Aug. 14, 2012, in Los Angeles.
