The 19-year-old "Keeping Up with the Kardashians" star took to social media to share videos and photos of the small surprise party, which she arranged with the help of the rapper's son King Cairo.
A video, posted to Jenner's Instagram, sees King Cairo, four, stood on the kitchen table surrounded by balloons, whilst she holds onto his waist for safety.
As Tyga walks in the door, they start to sing him 'Happy Birthday'.
Another clip features Jenner handing over Tyga a painted ornament of the word "dad", made by his son.
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