Big Sean is celebrating girlfriend Jhene Aikos daughter, Namiko Love, with a sweet message.

On Monday, the rapper shared a tribute to the girl in a since-expired Instagram story in honor of her 14th birthday, according to People .

Love you Nami! You one of the smartest, coolest people on [earth!] he wrote. The world is a much better place with you in it! Big 14!

Big Sean also referred to Namiko as his Anime plug and a newly big sis. He and Aiko announced Friday that they had welcomed a baby boy, named Noah Hasani, on Nov. 8.