<Tr> <Th_colspan="2"> Music video </Th> </Tr> <Tr> <Td_colspan="2"> "Lost Boy" on YouTube </Td> </Tr> <P> "Lost Boy" is the debut single by Canadian singer Ruth B. It was released on February 12, 2015 . She first released it by singing a six - second video on Vine in January 2015 . </P> <P> The song is written in the key of G major in cut time with a tempo of 62 beats per minute . It follows a chord progression of Em--G / D--C--G, and Berhe's vocals span from F ♯ to B . </P>

When did the song lost boy come out