I have a song lyric stuck in my head but have no idea what song it's from. Help?

The lyric in question is "I know we'll be together". It's sung by a girl with a soft voice. I thought it might have been from Glee because the voice kind of sounded like Quinn but googling the lyric and Glee together haven't resulted in any answers. It also sounded like AJ from Aly and AJ but I don't think it's from one of their songs either lol. I hope this info is sufficient haha.