I just fond this catchy song on youtube! It's easy to understand and sing this song as Karaoke.
Sounds very teenager tho ..
According to a newspaper, Katy Perry, Justin Bieber and other artists parodied this song just for fun. But somehow I can not find them ;( Humm..very curious..
http://www.youtube.com/watch?v=fWNaR-rxAic&feature=related