Rihanna attacked brother with bottle

R&B sensation Rihanna knows how to look after herself - she once smacked her brother in the face with a glass bottle.

The Umbrella hitmaker, who was schooled at Barbados' famous Cadet Corps, admits she was a terrible sister to her two younger brothers when she was growing up.

She tells Complex magazine: "We talk all the time now, but we used to fight -and when I say fight, I don't mean arguments; I mean physically fight.

"I hit the older one (brother) in the face with a glass bottle... My mom was pretty upset."