In 2006, Sunshine began going to professional auditions at the age of 11, and landed her first role in a commercial for Amazing Allysen the talking doll, as well as commercial work for Yoplait Go-Gurt, and Cap'n Crunch. In 2010, Sunshine filmed her first pilot for the CBS sitcom, Team Spitz, co-starring as the teenage daughter of a high school coach played by Rob Riggle of The Daily Show with Jon Stewart. In the summer of that same year, she gained popular notoriety for her role as Barbara Winslow in her first feature film, Marmaduke, based on the comic strip of the same name.
In the fall of 2010, Sunshine landed what would become a co-starring role on the Disney Channel original series, Shake It Up as European exchange student, Tinka Hessenheffer alongside Kenton Duty as her flamboyant twin brother, Gunther Hessenheffer. The glitzy brother/sister duo of Gunther and Tinka is said to be inspired by Ryan and Sharpay Evans of Disney's High School Musical franchise. While finding some aspects of the show formulaic, People Magazine critic, Tom Gliatto expressed appreciation for the comedic twosome's work on the series, writing - "Shake It Up doesn't shake up the kidcom formula, but it has something more than the usual shiny-sparkly cuteness... The best performances are from Caroline Sunshine and Kenton Duty as an overbearing brother-and-sister act from abroad named Tinka and Gunther. They're like High School Musical's Sharpay split in two and speaking in an unplaceable accent." She was a recurring cast member in Season 1 and a series regular in Seasons 2 and 3. Caroline is currently working on Shake It Up.
Sunshine has been working on an album since July 2012 and is almost finished with it. It is set to release sometime in 2014.
Sunshine currently lives in Orange County, California with her father Thom, her mother Karen, and her two younger brothers, Johnny and Chris. In her free time she enjoys dancing, traveling, cooking, baking, and photography, as well as outdoor activities including going to the beach, surfing, snorkeling and rafting. In February 2011, Sunshine became the spokesmodel for the teen fragrance, "Puppy Love 4 Girlz". "Puppy Love" Fragrances is committed to helping homeless dogs and puppies, with a portion of all proceeds of the perfume going to local animal shelters. In May 2011, Sunshine was named one of Dream Magazine's "Top 16 Under 16".
In addition to her work with "Puppy Love", Sunshine is involved in several other charitable causes including the "Joyful Sewing Organization", which makes blankets for cancer patients, "Working Wardrobes", which provides assistance to underprivileged women and victims of domestic abuse, the Orange County Child Abuse Prevention Center, which offers in-home parenting classes to families to break the generational cycle of abuse, the "Adopt A Hero" program, which provides for the needs of soldiers and their families; the "Loaves and Fishes Ministry" which helps to feed the homeless, and the "Thirst Project" which is dedicated to providing clean drinking water to communities in developing nations.