..definetely would be "Open up your heart and let the sun shine in"!, a line from Frente's song with the same title. Actually its originally sang by Joan Regan and her son, Rusty in 1954. But i know this song from Frente's cover version.
I like it because its very optimistic, and energizing to hear. Whenever i feel down, sad, full of problems, just remember the line from this song, and voilaaaa, i remember to smile again:)
That's why i pick the line to be my blog's title:D
*day 8 of 20 day blog challenge