Kanye West: A rapper whose talents are matched only by his controversies

Hailed as one of the greatest rappers of his generation, often by himself, Kanye West has always been a blend of prodigious talent and extreme ego.
His rise, first as a producer and then as a chart-topping musician and one half of a celebrity power-couple, has been matched only by his controversies, political dalliances and struggles with mental health.