Kanye West serenaded Kim Kardashian at the 2013 Met Ball on Monday night (06.05.13).

The rapper took to the stage at New York's Metropolitan Museum of Art to debut a new track for the annual Costume Institute Gala and made his pregnant girlfriend's heart melt when he spoke out to her in the crowd, dedicating the song to her.

Kim Kardashian is set to attend the Costume Institute Gala for the first time with Kanye West.

The 32-year-old reality TV star - who was allegedly banned for attending last year's prestigious event in New York by Vogue magazine editor Anna Wintour - will reportedly be by her rapper boyfriend's side at the star-studded ball on May 6, after settling her divorce battle with Kris Humphries ahead of a trial, which was originally due to take place in Los Angeles on the same day.

Kanye West is desperate for Anna Wintour to like Kim Kardashian.

The 'Mercy' rapper - who is expecting his first child with the 32-year-old reality TV star in early July - is trying to convince the fashion editor to put the brunette beauty on the US cover of Vogue magazine.