Kanye West writes lullaby for Blue Ivy's birthday

Kanye West penned a lullaby for Jay Z's daughter Blue Ivy on her birthday.

Beyonce and Jay Z rented out Jungle Island, a wildlife park and botanical garden in Miami, with a handful of close friend and family in attendance for the special occasion, Contctmusic reported.

Sources have revealed that 'Black Skinhead' rapper wanted to do something personal for his best friend's baby, and he decided he would write and record a lullaby especially for her.

Insiders added that West hopes that his lullaby would help her sleep at night.