Happy birthday to the smartest student I know! I’m wishing you all the luck in your studies, and the best of luck in life. Not that you’ll need it, of course!
Happy birthday, little brother! You might be jealous of your big sister in many ways, but I’ll always be envious of the fact that you’ll always be younger than me!
Happy birthday, girl! Today’s your special day and I hope it’s a cute one! May you be showered with love, dozens of pretty roses, and of course, lots of cake!