Colbie Caillat

Coblie Caillat's breakthrough single was called "Bubbly," a term that easily applies to the effervescent spirit that flows through her music. A native of Southern California -- her father Ken produced the landmark Fleetwood Mac albums Rumours and Tusk -- Caillat captured the mellow, carefree vibe of her hometown on Coco, the 2008 album that established her as an adult alternative force. Over the next few years, Caillat appeared regularly on the AAA charts: she duetted with Jason Mraz on his "Lucky," while "Fallin' for You," "I Never Told You," "I Do," "Brighter Than the Sun," ...