Let's make this birthday one to remember.

48 years old (Born on February 18, 1977)

Happy birthday, Chrissie! May you celebrate today with the unstoppable energy of your legendary 2007 Ironman World Championship debut—where finishing first was simply too mainstream a goal; crushing records seemed much more fun. Your incredible performances have taught us ordinary humans that swimming 2.4 miles, biking 112 miles, and running a marathon is just called "Saturday."

Seriously though, you're an inspiration whose historic victories are timeless achievements in endurance sports—and comedy gold to those who can't sprint for coffee without getting out of breath! Wishing you endless joy on this special day; remember, age is just another number you'd easily dominate.