Inga Hensina Andersen (March 10, 1909–September 28, 1959) was a Canadian singer and dancer, born in Argentina of Danish heritage.

Andersen acted, sang, and choreographed dance in England, like Wild Violets at Drury Lane.

She reportedly made the top ten of Hitler's black list for the propaganda songs she sang about him, like "Hail Adolph".

[5][6][8][12] She refined her technique and skills by taking courses every summer in locales such as Detroit, New York,[13] Pittsburgh,[14] and Seattle.

[15] After studying at the Barbes School of Dance in Vancouver, she returned to Prince George and began teaching young girls at age 16.

[8] From there, she got work in New York in The Girl of the Golden West and Ballyhoo, performed with the Ziegfeld Follies, and Rasch asked Andersen to come to England to help with Wild Violets.

[26] At the beginning of World War II, she became popular for singing "We're Going to Hang out the Washing on the Siegfried Line".

[26] Andersen entertained with cabaret shows at Cafe de Paris, where it was said that she "sang songs that were topical, witty and a bit naughty" at elegant places.

[27] In London, she also starred in Fig Leaves (February 1940),[28] Cole Porter's Du Barry Was a Lady (1942),[29] and Flying Colours (1943).

[30] Ten days into World War II, Andersen began to perform for the British troops, the first entertainer to do so.

[31][32] She acquired the name "The Blackout Girl" because she was rare among entertainers to perform during black-out conditions and alongside bombed out buildings.

[33] She became lost and went behind German enemy lines to play to 80,000 soldiers during the Battle of Monte Cassino in Italy.

[35] She was a guest performer for the International College of Surgeons' Convention in Buenos Aires, her birth city, where she met Eva Peron.