In need of an at-home hair color intervention? Help is on the way! Celebrity hairstylist Harry Josh has an impressive lineup of celebrity clients on speed-dial: Gisele Bundchen, Priyanka Chopra and Karlie Kloss — just to name a few. But even though the beauty pro works with the biggest names in the game, he’s no stranger to the magical powers of a $12 box of drugstore hair dye.