The best gift I could give you is a reminder that you’ll always be younger than me! Happy birthday, little bro!
Happy birthday to my naughty little brother! Luckily you have a great elder sister like me to keep you in...
Another year older and you're more handsome than ever, little bro! Our good looks must run in the family!
You might be getting older, little bro, but you’re certainly not getting any wiser! Happy birthday to you!
You used to enjoy being naughty and mischievous when you were little, brother, and I’m glad to see that...