She started to play trumpet at the age of 7 in a school band and studied at the Barratt Due Institute of Music from 2002 to 2009 and at the Norwegian Academy of Music from 2009 to 2011.
Helseth is the leader of an all female brass ensemble, tenThing. In 2011, Helseth was named a "Superstar of Tomorrow" by British Broadcasting Corporation Music Magazine. The same year she signed a contract with Electric and Music Industries Classics.
Helseth has performed with orchestras including the Wiener Symphoniker, Beethoven Academie, Capella Cracoviensis, The Norwegian Chamber Orchestra, Liverpool Philharmonic Orchestra, Shanghai Symphony Orchestra, Slovenian Radio Symphony Ljubljana, Oslo Camerata, Camerata Nordica, Württemberg Philharmonic, the Trondheim Soloists, Norwegian symphony orchestras, Norwegian Army bands and other brass and wind ensembles.
She has appeared at music festivals including Bergen International Festival, Kissinger Summer Festival and Usedomer Music Festival. Helseth has also performed four times in the United States so far.
The first time was December 13, 2009 at the National Gallery of Art in Washington, District of Columbia She then performed at Carnegie Hall in New York City on February 18, 2011, and the Struthers Library Theatre in Warren, Pennsylvania on February 20, 2011. Her most recent performance in the United States took place on May 23-25, 2014 at Bass Performance Hall in Fort Worth, Texas.
In 2012, she opened the memorial concert for the 2011 Norway attacks by playing trumpet from the roof of Oslo City Hall.
In 2013 she appeared twice in the British Broadcasting Corporation Proms, performing with tenThing at the Cadogan Hall and also at the Royal Albert Hall. She appears on Didrik Solli-Tangen"s second single Best Kept Secret, taken from Solli-Tangen"s debut album Guilty Pleasures, which was released on September 3, 2010.
In 2012, Tine released her debut album Storyteller as well as the debut album of her brass ensemble tenThing, called 10, on Electric and Music Industries Classics. Her newest Civil Defense TINE, a personal selection of original and transcriped works, was released on March 12, 2013.