Let's make this birthday one to remember.

43 years old (Born on June 15, 1981)

Happy Birthday, Billy! Another year shredding guitar solos and rocking keyboards—you're officially the master of multitasking. From pop-punk anthems to dance-floor hits with Good Charlotte, you've proven that age is just a number (though your hair might disagree). Your riffs are timeless; your style iconic.

Here's hoping this birthday brings you as much joy as those epic moments on stage when thousands sing along to every note you play. Keep making music history—and remember: you're not getting older, just leveling up in rockstar wisdom. Cheers to another legendary trip around the sun filled with laughter and unforgettable tunes!