Hozier: 'My music references sex and Russia'

The singer-songwriter Hozier has been catapulted onto the international stage.

Almost unheard of in his native Ireland at the start of the year, he has now had sell-out US tours, appeared on American chat-shows and had millions of hits on YouTube.

Andrew Hozier-Byrne told BBC Breakfast why one of his songs has caused some controversy.