If you want to get a more grown up perfume Aqua di gio is light an fruity. Giorgio Armani has a home on teh idland of Pantelleria in the Mediteranian, and that is the scent that reminds him of the flora and the sea on the island. We used to pump a similar scent through Armani Exchange when they first launched the stores in the US.
For a classic, Cristalle by Channel, is very fruity and fairly light.
Lastly CK1 is citrus and light.
I also agree that some of the ones directly marketed to younger people might work, but by 15 I was kind of past that.