Cake is mandatory growing up is optional Let's eat cake and pretend we're kids again Happy #birthday sis.

Happy #birthday to the one who steals my clothes and my heart Here's to more shared wardrobes and endless laughter.

Another year older wiser and still putting up with me Happy #birthday sis.

Age is just a number but you'll always be older than me Happy #birthday sis.

Hashtags for Captions on Sisterly Celebrations

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