Gigi Hadid celebrates beau Zayn Malik's 23th b'day

As Zayn Malik turns 23, his lady love has planned something special for him.

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Gigi Hadid took to her Instagram handle and posted a photo of a Z-pendant necklace with the Malik's birth date and time written in the upper left corner, reports E! Online.

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The 20-year-old model captioned the picture, "ZDAY."

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A source revealed that the duo is spending the special occasion together, adding that Hadid loves birthdays, so she is happy she can be their to celebrate with Malik.

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The insider also revealed that Hadid has also given some very thoughtful gifts to the birthday boy.