First of all Selena and Demi were on Barney and Friends. They started when they were 7 years old. Selena met Demi at the auditions and bothed loved singing. At rehersals, they played games like celebritys. When they rehersersd, they messed up the lines and laughed for a very long time. When they were alone Selena asked Demi if she wanted to be her friend and Demi a dit yes. For the rest of the show, they were Friends and then became bffs. Their Mums met and they also became bffs. And thats how Selena and Demi became friends!