You can buy Roar!
Katy did something with Pepsi & MTV with the VMAs, allowing us to choose her next single! Dark Horse won, but I preferred Walking On Air...
Other songs I've heard that will be on there are:
Hmm... it's OK, it's cool, but it's not my favorite. She could have been a lot more creative.
Katy announced on the Good Morning America show last Friday that she's having a contest. If you make a video of you and friends doing something to Roar, and your video wins, she'll come do a concert RIGHT AT YOUR SCHOOL! I really really want to enter, but I have no idea what to do, and I don;t think anyone else in my school would want to do it :/