Well Aquamarine is a very nice flick ,its about these two teenagers who help a mermaid find a guy that she can love ,a She's the man is hilarious the one with Amanda Bynes disguising herself as her brother . A Cinderella Story with Hilary Duff and Chad Micheal Murray (very cute).
Also you should definetly check out Enchanted ,has no teens in it but it is so.................romantic if your into those kind of things.

And also check Youtube.com to see have they got them on. Good luck

How to deal: Such a great and sad movie. You should really see this one.

And some others:

She's the man
The perfect man
Raising Helen
New York minute
Freaky Friday
Girls just want to have fun (haven't seen this though)
Thirteen
Grind
Flicka
The pacifier
Odd girl out
Augusta gone
She's too young

i know tons!!!!!!!! just chat with me on my profile. i will give u tons. i promise.

Last I checked you could find the movie "Another Cinderella Story" with Drew Seeley and Selena Gomez at www.supernovatube.com

Hmm well yew should def watch Nick and Norah's Infinite Playlist,A walk to Remember(really cute),any American Pie(they are LOL),10 things I hate about yew(great one),It's a boy girl thing(I love this one)and so many more I can't really think of.:)