Could you imagine being a best-selling author and one of the most well-known motivational speakers at only 13? Tony Robbins can. As a leap year baby -- born on February 29, 1960 -- Robbins has technically had only 13 birthdays, including today. (Happy Birthday, Tony!).
Seriously though, the "Awaken the Giant Within" author turns 52 today and seems to have a positive outlook on getting older. As Robbins tweeted on his 50th birthday (on March 1, 2010 because there was no February 29 that year):
In the mood for some inspiration? Read some of Robbins' quotes on living a happy, successful life here, and check out our slideshow below for some of our favorite tweets from the self-help guru.