King wrote her first song ("I’m Just So Blue") for her brother when she was 13, and released her first album, This is Forever, in December 2003.

At the age of 16 Samantha was a featured performer in the 2001 World Championship ceremonies in Edmonton for the theme song "We've Got the Fire" by Jan Randall.

She was then given the opportunity by RCA Nashville to work with The Mavericks lead singer, Raul Malo. She has also worked with Randy Bachman (Bachman–Turner Overdrive) and Buddy Cannon (Kenny Chesney’s Producer).

As an entertainer she’s performed on festival main stages with Tim McGraw, Alan Jackson, Jann Arden, Sawyer Brown, The Oak Ridge Boys, Joe Nichols, Duane Steele, George Fox, Doc Walker, Charlie Major, Colin James, Honeymoon Suite and many more.

She has written songs with several of Nashville’s well known songwriters including Lisa Brokop (Artist), Tim Taylor (Jason McCoy), LuAnn Reid (Kenny Chesney), Eddie Schwartz (Hit Me With Your Best Shot), Ted Hewitt (Curb Music Producer), Joie Scott (Shania Twain) and many more.

In 2009, the day before she was to perform on the main stage at the Big Valley Jamboree in Camrose, Alberta, there was a large windstorm that collapsed the main stage - and caused the remainder of the four-day concert to be cancelled. As a make-up concert, King opened for Tim McGraw on September 17, 2009, at Rexall Place in Edmonton, Alberta, singing a brand new song entitled "Let It Rain". Funds raised were donated to the Donna Moore fund providing for the family of the woman who died in the stage collapse.