Happy birthday from your better-looking and totally awesome younger sibling!
It can’t have been easy growing up with me, especially as I would get away with anything! Don’t feel bad though, sis, the younger sibling is always the favorite of the family!
You are my bestest friend in the whole entire world, a true kindred spirit. It’s only fair that a girl with a beautiful soul deserves an equally beautiful birthday.
I’m wishing you all the happiness in the world on your special day, bestie.
It must be so nice not ever having to worry about your age because at least you’ll always be younger than me! That’s possibly the best gift I could ever give to you!
Is this day just special? No, it's the most special day of all. It is the birthday of my baby sis. Your birthday is even more special than my own. For this was the day I gained my best friend and companion for life.
Today is your special day, big sis, and I would like to thank you for always keeping a close and caring eye on me, never letting anything interfere with my happiness and for always protecting me.
I’m so blessed for having you in my life and being able to share my childhood with you. I feel like I owe so much to you.