Let's make this birthday one to remember.

40 years old (Born on October 22, 1985)

Happy Birthday, Zac Hanson! From the days of "MMMBop" to your latest musical adventures, you've proven that talent and charm never go out of style. Whether you're rocking drums or harmonizing perfectly with your brothers, you always bring joy—and let's be honest—some serious nostalgia.

Here's hoping this year brings even more catchy tunes and unforgettable moments on stage. Keep drumming up smiles (pun intended!) because fans everywhere still can't resist singing along whenever you're around. May your birthday be filled with laughter, cake that's sweeter than a '90s pop hit, and memories as timeless as Hanson's greatest hits!