Kanye West is reportedly jealous of Pharrell Williams.

The "Blood On The Leaves" rapper is said to be keeping a close eye on the "Happy" hitmaker after reports he is close to signing a deal with Adidas, the same sportswear brand that Kanye has been commissioned to design a clothing range for.

"They are competitive in both music and fashion, Kanye always watches what Pharrell does. He thinks having a similar artist working on their own brand for Adidas will make his collection less special," a source said.

Kanye signed a deal with Adidas in December last year after a spat with the Nike - over royalties for his exclusive collection of Air Yeezy sneakers - which resulted in the end of his business relationship with the sportswear brand.