This is pretty adorable... Beyonce captioned it "Happy Birthday to my sis! I love you deep." There were obviously loads of emojis, mainly floating balloons and the mandatory dancing red dress lady.
Speaking of how deep their love runs, Beyonce previously said in an Essence interview many moons ago in 2003: "I'm very proud of my sister and protective of her. Solange is the one person I will fight for. Don't talk about my sister; don't play with me about my sister. If you do, you'll see another side of me. I admire her, and though she's five years younger than me, I strive to be like her. She's so smart and secure. She's sensitive to people's feelings, but not afraid of what they think."
Is your sibling your best friend? Or do you still the hold the fact that they, oh, I don't know, stood on your Sindy and smashed her head in against them twenty years later?