K.J. Apa isn't one for keeping his bawdy in the dark, but he's really outdoing himself recently with tons of great shirtless updates on Instagram. The twenty-three-year-old Riverdale starlet has one of the most shredded bods in the business, and whether he's flaunting his hard work at the gym on Riverdale or taking to the 'Gram, we just can't get enough of what this gorgeous man has to offer.