Happy 78th Birthday to the one and only David Letterman! Can you believe it's been 78 years since you graced the world with your wit and humor? Time sure flies when you're making people laugh. And let's be honest, you're still killing it. So today, on your special day, take a break from counting down the top 10 and just relish in all the love and adoration coming your way. Cheers to another year of making us laugh and reminding us to never take life too seriously. Keep being you, Dave.