Well, folks, Joe Jonas just debuted one of his most drastic hair-color transformations to date. The "Cool" singer, who went platinum blonde back in the spring shortly after his daughter was born, now has nearly-neon pink hair — and in honor of Breast Cancer Awareness Month to boot. On Friday evening, the pop star unveiled his new look on his Instagram Story in a super-cute selfie with a pink ribbon sticker in the background to signify the makeover was done specifically for Breast Cancer Awareness Month. More celebrity hair-color switch-ups: Now watch Lucy Hale do nine other things she's never tried before: