Date: Maybe 5-10 years old.

Country of origin: Don't know, seen it with hungarian dubbing, 

It's a teen-romance movie. The boy is a star singer who while on tour, somehow misses his trailer and is left behind in a foreign city. The girl starts helping him, becomes his guide, she even lets him stay in her family's house, without the consent of her parents.
The girl is an amateur photographer and she delivers pizza (?) after school to gather money for college and she's being ridiculed for this by her peers.