Kanye West has written a love song for his reality star girlfriend Kim Kardashian and it's called "Perfect b***h".

The 35-year-old rapper has announced via twitter that his new track 'Perfect B***h' is "about his search for the perfect woman and how he has now found the 'perfect b***h.'" West tweeted: "I wrote the song Perfect Bitch about Kim."

The outspoken rap artist was partying with Leonardo DiCaprio when he pulled out a laptop and asked DJ Reach to blast out his new songs. Onlookers revealed 'Perfect B***h' contains numerous references to Kardashian’s infamous curvaceous figure and pert derriere.

West is reportedly so smitten with his glamourous new girl - who he has been dating since April - that he intends to propose to her once her divorce to Humphries is finalized and reports claim he is designing an engagement ring for her.

You can hear West’s ode to Kardashian will on his upcoming album, 'Cruel Summer.’