On Monday, Aug. 25, Justin Bieber shared two shirtless mirror selfies on Instagram wearing workout shorts and a white beanie. "👅👅 thirstrap fa u h---," Justin, 31, captioned the pictures. The model, 28, simply posted the eye-rolling emoji in response, writing, "🙄."

Justin Bieber showed off his toned physique on Instagram this week, prompting reactions from fans and his wife, Hailey Baldwin Bieber. The pop star shared a series of shirtless selfies that quickly became a hot topic on social media.