Between 1990 and 1996 Katherine was a member of the Royal School of Church Music Cathedral Singers, where she achieved the St Cecilia Award, its highest accolade. She twice won the BBC Radio 2 Welsh Choirgirl Of The Year contest, and won the BET Welsh Choirgirl Of The Year. Katherine was awarded the Pelenna Valley Male Voice Choir Scholarship for the most promising young singer, and at the age of 17 won a scholarship to study at the Royal Academy of Music in London.

Jenkins' album Second Nature was named the Album of the Year at the 2005 Classical Brit Awards on May 25, 2005. She repeated this success the following year with her Living the Dream album. This award is chosen by listeners of Classic FM.

Dame Vera Lynn has dubbed Katherine the new "Forces Sweetheart", a nickname given to Lynn during World War II, for her visits to entertain troops after the Iraq invasion. In both 2005 and 2006, she spent christmas entertaining troops in Iraq.

--Wikipedia