How did Justin Bieber met Taylor Swift? I saw one of the videos on youtube. Did he go to one of her concerts? How many songs will be on pt. 2 for "My World" CD?

I know how he met Taylor but, I'm not sure about My World. SO here's my answer. He opened for Taylor at one of her concerts. Did you know that he broke his leg when this happened? :(

I heard that Taylor did something on youtube of his video"One Time",and he saw it and he thought that it was sweet so he dedicated"Favorite Girl" to her or something like that.He has actually been an opening act for one of her concerts from what i heard.Some of the songs that he has on his first cd might be on it but alot of his new songs will be too.