Justin Biebers fans screamed with delight as he was crooning to swooning girls in Calgary Monday night.

"I really like his music and his songs, how he writes them from the heart. And I think he's really hot!" gushed one fan.

Some other girls waited in their Bieber mobile since early Monday morning, trying catch a glimpse of the star.

It paid off when they managed to get a photo of him.

"It was amazing! He's even more beautiful in person."

The Canadian superstar has been tearing up international floors and the charts. At 16, he's one of the youngest solo artists to go number one in decades

If you didn't get a chance to see Justin live in concert, you can catch him on the season premier of CSI Thursday night on CTV.