Kanye West's work with his 17-year-old protege Pia Mia has reportedly made fiance Kim Kardashian very jealous.

According to Radar Online, the 36-year-old rapper believes the teen singer is going to be the next 'Rihanna' in the music world. An insider told the website that West had made it clear that their relationship is "strictly creative", but the two have grown closer, and Mia has become one of his trusted advisors.

The 33-year-old reality TV star was kind of agitated by their relationship because West doesn't usually take her advice, the source added.