Selena's song "Rock God" good or bad?

There have been many discutions wether this song is bad or good. I have read many comments on youtube by people that are say they are not bothered. Personaly I still haven't desided if it is an insult or a tipical song written by a teen. I try to remember that this song is written by Selena and that Selena is my roll model and a good person but I am still confused. Maybe if you listen to the song you can draw your own conclution.

To listen to the song:

http://www.youtube.com/watch?v=38q7-msKVh4