1. Birthday Boy Justin Bieber Celebrates with Low-Riding Car (and Pants!) as Family and Friends Send Well-Wishes  PEOPLE.com
  2. Justin Bieber Went Around and Around and Around a Racetrack for His Birthday  Vanity Fair
  3. Chance The Rapper, John Mayer & More Wish Justin Bieber Happy Birthday  Billboard
  4. Selena Gomez Makes It Instagram Official With a Justin Bieber Birthday Post  ELLE.com
  5. Full coverage