Why did Kanye West lose his cool?

London, Oct 16 (IANS) Rapper-cum-fashion designer Kanye West threw a fit of rage when asked about his girlfriend Kim Kardashain's ex-boyfriend.

Kim and Kanye went for a dinner at an upscale steak house, Prime 112, in Miami Sunday night where the realty TV star's ex boyfriend Reggie Bush was also present.

The 35-year-old got angry when a camerawoman outside the eatery asked the singer if he congratulated Bush, who is about to become a father for the first time.

Clenching his teeth, Kanye walked right up to the woman and grabbed her camera, reports dailymail.co.uk.

Meanwhile, Kim, who dated Reggie on and off for two years, was seen trying to calm Kanye down.