I havent been able to find name of the song or artist who sings the song on the episode Lauren Looks Back when they are in the car after prom and it looks at Lauren leaving Laguna.
Some of the lyrics are :
You held my hand, you understand who i am
Through it all you broke my fall and here i stand.
Touch the sky ill always remember why i care, our dreams are all the same
You gave me my wings, ive learned so many things and now i can thank you
I will never feel alone, coz you will be there for me i know.