She was given a guitar at the age of 12 and discovered a love of folk music, adopting a vocal style similar to that of Joan Baez and Judy Collins.

Lena collaborated with her best friend Pia, a lyricist, and in December 1970, she sent seven songs with guitar accompaniment to the Janne Forsell school as part of an admissions application and after some of her music made its way to radio, she came to the attention of manager Stig Anderson.

In January of that year Lena went to Stockholm, accompanied by her father, to train and she did a live recording on the program Midnight Hour where she met Stig Anderson in person, leading to an offer to produce an LP.

Following some success with her LP, Andersson made her television debut at age 15 in April 1971 in Hylands hörna with Är det konstigt att man längtar bort nån gång (I'm Gonna Be a Country Girl Again), a song written by Buffy Sainte-Marie with Swedish lyrics by Stig Anderson.

In 1972, she released an LP in Japan including two songs in Japanese and in the same years she attended (together with Björn and Benny of ABBA fame) the "Tokyo Music Festival", performing "Better To Have Loved" and receiving first prize.

She continues to sing, focusing on writing new music, authoring for various publications, and performing at church functions, festivals, medium to larger venues, as a choir member, a worship leader and as the main draw.