Justin Bieber, 26, vowed to “go hard this month” when he showed off his abs and tattoos in an eye-catching new pic. The singer shared the mirror selfie, which he took while crouched down and wearing black shorts in a workout room, to his Instagram page on July 4 and his caption for it was filled with encouraging words to his fans about goals for the next 31 days. “Gonna go hard this month COMMENT ‘I’m in’ If you plan taking diet, exercise and attitude to the next level this month,” it read.