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If you're happy and you know it lift your shirt. Pharrell Williams shows the crowd some love (and skin) during a performance at the 2014 Made In America festival at Ben Franklin Parkway in Philadelphia on Aug. 31 2014
He can't slow down. #LionelRichie delivers an energetic set at the 2013 Austin City Limits Music Festival at #Zilker park on Oct. 6 in Austin, Texas
Janelle Monae performs during the 2013 Essence Festival at the Mercedes-Benz Superdome on July 7, 2014 in New Orleans, Louisiana.
Sarah Silverman performs at the 2014 Oddball Comedy Festival at the PNC Bank Arts Center in Holmdel, N.J., on Aug. 17, 2014
Louis CK performs at the 2014 Oddball Comedy Festival at the PNC Bank Arts Center in Holmdel, N.J., on Aug. 17, 2014
Nicolas Cage speaks onstage at "A Conversation with Nicolas Cage" during the 2014 SXSW Music, Film Interactive Festival at Austin Convention Center on March 10, 2014
Up close and personal. #CarlyRaeJepsen connects with her fans during a performance at We Day Minnesota on Oct. 8, 2013 in St. Paul, Minn.
Katy Perry "Roars" for the Ole Miss Rebels as she watches the team take on the Alabama Crimson Tide on Oct. 4, 2014 at University of Mississippi in Oxford, Miss.
Demi Lovato is confidently fierce with her new blue hair during a performance on Oct. 2, 2014 at XFINITY Arena at Everett in Everett, Wash.
Baby, it's cold outside. #MileyCyrus keeps warm during a performance at Power 96.1-FM's Jingle Ball 2013 on Dec. 11 at #PhillipsArena in Atlanta