SACRAMENTO - JULY 20: Amy Heidemann  of Karmin performs with Adam Lambert, Demi Lavoto, and Owl City in 107.9's annual EndFest at Power Balance Pavilion in Sacramento, California on July 20, 2012
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SACRAMENTO - JULY 20: Amy Heidemann of Karmin performs with Adam Lambert, Demi Lavoto, and Owl City in 107.9's annual EndFest at Power Balance Pavilion in Sacramento, California on July 20, 2012