Soundtrack.

Track listing
1. Drama Queen (That Girl) - Lindsay Lohan
2. I'm Ready - Cherie
3. Ladies Night - Atomic Kitten, Kool & the Gang, Kool & the Gang
4. Perfect [Acoustic Version] - Simple Plan
5. Tomorrow - Lillix
6. What Are You Waiting For - Lindsay Lohan
7. Na Na - Superchic[k] Alumni
8. 1, 2, 3
9. Medley: Don't Move On/Living for the City/Changes - Lindsay Lohan
10. Boom - Fan_3,
11. Day in the Life - Lindsay Lohan
12. Real Me
13. Un-Sweet Sixteen - Wakefield
14. Only in the Movies - Diffuser

This soundtrack includes a mixture of mainstream music produced separately to the film and songs created just for the movie. The majority of the films created for the film are song by the main actress Lindsay Lohan.
The genre of the track in the sound track are all 'pop' or sub-genres such as rock pop
This seems to be a convention for the style of music induced in teenage Romantic comedy's.