Guy Fieri is opening up about his "JustaGuy" transformation. "If you're going to go big, go big," Fieri, 58, told People in an interview published on Monday, January 26. Fieri shocked fans on January 22 when he showed off a brand new look for his 58th birthday via Instagram. The transformation included shaving his goatee and ditching his famous spiky blonde hair for a sleek brunette look. He completed the look by trading in his signature casual clothing style for a blue gingham button-up, a brown belt and khakis.