There are at least two artists known as Luba - a Canadian and a Russian.
Luba (born Luba Kowalchyk, 1958 in Montreal, Quebec, Canada) is a Canadian singer and songwriter. Growing up, she studied voice, guitar, flute, and piano; she later travelled across Canada to perform traditional Ukrainian folk songs at weddings and social gatherings.
In 1979 she formed the band Luba with drummer Peter Marunzak, guitarist Mark Lyman, bassist Mike Zwonok, guitarist John Nestorowich, and keyboardist Doug Short. Read more on Last.fm