Let's make this birthday one to remember.

40 years old (Born on October 22, 1985)

Happy Birthday, Zachary Hanson! From the days of "MMMBop" to your recent musical adventures, you've proven that catchy tunes and great hair never go out of style. Your ability to keep fans singing along through decades is truly impressive—clearly you're aging like fine wine (or at least a really good guitar riff).

Here's wishing you another year filled with chart-topping hits, sold-out shows, and endless inspiration. May your birthday be as timelessly awesome as those harmonies we still can't get out of our heads—and may you continue rocking stages worldwide for many more years ahead. Cheers!