Toronto: At 17, Justin Bieber knows how to keep his young fans happy. At a charity fund-raiser at Toronto, he made a personal donation of USD 500,000, and even spent some time backstage with three fans, diagnosed with life-threatening illnesses.

The event was held for The Children's Wish Foundation of Canada. The singer entertained his young fans by crooning Christmas songs and also his hit track Baby!, as reported.

It's been an eventful year for the Canadian superstar, with hit Christmas albums, sold-out tours and even allegations of paternity. But the global superstar can still look back on 2011 as a hugely successful year which has seen him cement his profile as a popular star.

(Agencies)