- Happy birthday to my favorite little sister. You’re not just my sister, you’re also my very best mosquito repellent.
- Congrats on another year of tolerating our family’s craziness. Happy birthday, little sis!
- Happy birthday, little sister! I hope your day is as amazing as you are (but not as smelly as your feet).
- It’s your special day, little sis! So make a wish, blow out the candles, and try not to burn down the house!
- Happy birthday to my wonderful little sister! I hope your day is filled with lots of cake and plenty of presents… but not too many, because I still need to save up for my own gifts.
- It’s your birthday, little sis! Don’t worry, I won’t tell everyone how old you are. (But if they ask, I’m totally spilling the beans!)
- Happy birthday to the world’s coolest little sister! May your day be filled with all your favorite things… and a few surprises, too.
- I’m so lucky to have a little sister like you. You’re funny, smart, and always there to make me feel better… unless you’re the one making me feel worse!
- Happy birthday, little sis! Just remember: getting older is mandatory, but acting your age is totally optional.
- It’s your special day, little sister! So sit back, relax, and let the grown-ups handle everything… just kidding, we need your help blowing up the balloons.
- Happy birthday to my favorite little sister! I hope your day is as fabulous as you are (but not as messy as your room).
- Congrats on another year of putting up with me. You’re the best little sister a big brother could ask for!
- Happy birthday, little sis! I hope your day is filled with all your favorite things… except for Justin Bieber. I draw the line at Justin Bieber.
- It’s your big day, little sis! So eat all the cake, dance like nobody’s watching, and remember to brush your teeth before bed.
- Happy birthday to my awesome little sister! May your day be filled with laughter, love, and lots and lots of cake.
- Congrats on another year of being a total rockstar. Happy birthday, little sis!
- It’s your special day, little sister! So make a wish, blow out the candles, and try not to spit all over the cake.
- Happy birthday, little sis! You’re the reason I never have to worry about my own kids misbehaving… I can just threaten to send them to live with you!
- It’s your birthday, little sis! So eat all the cake, sing all the songs, and party like a rockstar… just remember, you still have to go to bed at 8 o’clock.
- Happy birthday to my wonderful little sister! May your day be filled with all the things that make you happy… and none of the things that make you sad (like broccoli).
- Congrats on another year of being the coolest little sister around. Happy birthday!
- It’s your big day, little sis! So put on your party hat, grab a slice of cake, and get ready to have some fun.
- Happy birthday to my awesome little sister! You’re the reason I never have to worry about being the youngest in the family.
- It’s your special day, little sister! So kick back, relax, and enjoy all the love and attention… until I steal the spotlight again.
- Happy birthday to my little sister! You’re growing up so fast, and I’m so proud of the person you’re becoming.
- To my favorite little sister, happy birthday! I hope this year is full of love, laughter, and all your favorite things.
- Happy birthday to the coolest little sister around! May all your dreams and wishes come true today and always.
- Wishing my little sister the happiest of birthdays! You bring so much joy and happiness to my life, and I’m grateful to have you as my sibling.
- Happy birthday to my sweet little sister! May your day be filled with all the things you love and all the people you adore.
- To my little sister on her special day, happy birthday! You are a bright light in my life, and I’m thankful for your presence.
- Happy birthday to the world’s best little sister! May your birthday be filled with lots of cake, presents, and all your favorite things.
- Wishing my little sister a very happy birthday! I’m so grateful to have you as my sibling, and I hope your day is as wonderful as you are.
- To my little sister on her birthday, may all your wishes come true! You are loved more than you know.
- Happy birthday to my little sister! You are a true blessing in my life, and I’m honored to be your sibling.
- Wishing my little sister a very happy birthday! You are growing up so fast, and I can’t wait to see all the amazing things you’ll accomplish.
- Happy birthday to my little sister, who always knows how to make me laugh! May your day be filled with lots of laughter and joy.
- To the little sister who makes every day brighter, happy birthday! May your day be as wonderful as you are.
- Happy birthday to my little sister, who has a heart of gold! You are kind, loving, and so special to me.
- Wishing my little sister a very happy birthday! May your day be filled with all the things that make you happy.
- Happy birthday to my amazing little sister! You are strong, brave, and so inspiring.
- To my little sister on her birthday, may all your dreams come true! You are capable of anything you set your mind to.
- Happy birthday to the sweetest little sister in the world! You bring so much joy to everyone around you.
- Wishing my little sister a very happy birthday! You are loved, cherished, and appreciated more than you know.
- Happy birthday to my little sister, who is growing up to be an incredible person! I can’t wait to see all the amazing things you’ll accomplish.
- To my little sister on her special day, happy birthday! You are loved beyond measure, and I’m proud to call you my sibling.
- Happy birthday to the little sister who always makes me smile! May your day be filled with all the things that make you happy.
- Wishing my little sister a very happy birthday! You are one of a kind, and I’m grateful to have you in my life.
- Happy birthday to the coolest little sister around! May your day be as awesome as you are.
- To my little sister on her birthday, may all your wishes come true! You deserve all the love and happiness in the world.
- Happy birthday to my little sister, who is growing up to be an amazing young woman! I’m so proud of you and all your accomplishments.
- Wishing my little sister a very happy birthday! You are a gift to everyone around you.
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