Singer of one of the most popular songs where I'm at, Colbie Caillat uses mainly acoustic guitars and maybe a bass guitar and occasionally a soft drum to her songs. Bubbly isn't my personal favorite from her, but it is popular and is number 9 on iTunes. Realize is a darker song, but this one I actually like. There is a male vocalist in this whose identity I don't know, but it adds to make a great song. Enjoy!
Download Bubbly: Here
Download Realize: Here