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The Cimorelli sisters' CimFam EP the cover is seen at left debuted at No. 6 on Apple's iTunes pop chart earlier this month. The sisters honed their style singing in musical theater and at Kings games and the State Fair. "Each one of them has a unique voice and unique tone. You wouldn't look and say, 'That one is the star.' They are all stars," said Chloe Roberts, who signed them to a record contract.