Solange Knowles Wishes Niece Blue Ivy Happy Birthday, Calls Her “My Twin” and “Sassy Pants”: Photo

She sure is loved! Solange Knowles wished her niece Blue Ivy a happy 3rd birthday in a sweet Instagram post on Wednesday, Jan. 7.

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The DJ, who married video director Alan Ferguson in November, also posted a cute photo with her little pal. She tightly held onto Beyonce and Jay Z's daughter as they played with makeup.

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"My twin, my fellow sassy pants, my dancing partner, my incredibly smart, beautiful, niece-y-poo, turns 3 today!" Knowles, 28, captioned. "I love her so much."

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Earlier in the day, Beyonce posted a photo of Blue's Frozen-inspired birthday cake. "[Blue is] addicted to Frozen," an insider previously told Us Weekly. She "watches it several times a day" and "cries when pulled away."

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