The Apple App Store is filled with music apps created to teach you the basics of reading and playing music. I should know, I download a new one every January as part of a New Year's resolution to ...

We saw the iPad being used as music instrument in the past. There are hundreds of cool applications for DJs, guitar players, even orchestra directors. I bet you haven’t seen anything like this though.

Well it turns out, no: someone did. In the video embedded below, an adventurous iPad user has recreated Katy Perry’s “Teenage Dream” using only music apps for the tablet, including Cat Piano.