"Don't drop me!" Diplo of Major Lazer takes crowd surfing to another level during a performance at the Treasure Island Music Festival on Oct. 19 in San Francisco

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

Sarah Silverman performs at the 2014 Oddball Comedy Festival at the PNC Bank Arts Center in Holmdel, N.J., on Aug. 17, 2014

Joan Jett and Slash join forces at the 2014 Alternative Press Music Awards on July 21, 2014 at Rock and Roll Hall of Fame in Cleveland

Jenny Lewis performs during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco, on Aug. 8, 2014. Check out other Celebs Spotted at Golden Gate Park! http://celebhotspots.com/hotspot/?hotspotid=30754&next=1

Michael Polish and Kate Bosworth at the 56th Annual San Francisco International Film Festival @ #SundanceKabuki Cinemas on 4/28/13