Lena Martell  (born Helen Thomson; 15 May 1940, Possilpark, Glasgow) is a Scottish singer, who had a number one UK single with “One Day at a Time” in 1979.  She began singing at the age of 11 with her eldest brother’s band.  After his untimely death, she decided to pursue a career in music as a tribute.  She had released a number of standards in the 1970s on the Pye record label and drew crowds at cabarets.  Her cover of the song “One Day at a Time” reached the top of the UK Singles Chart for three weeks in November 1979.  She placed six albums in the UK Albums Chart between 1974 and 1980, including four that reached the Top 20.  (More from Wikipedia)