Let's make this birthday one to remember.

29 years old (Born on January 25, 1996)

Happy Birthday, Calum Hood! From rocking stages worldwide with 5 Seconds of Summer since 2011 to making bass lines cooler than Vegemite sandwiches, you've truly mastered the art of being effortlessly awesome. Whether it's your iconic stage jumps or those unforgettable harmonies in hits like "Youngblood" and "Teeth," you keep fans dancing—and occasionally swooning—year after year.

Here's hoping your birthday is as legendary as your recent successes: topping charts, selling out arenas, and somehow managing to look cool even when you're just tuning a guitar. Keep slapping that bass and flashing that smile—we're all here for it!