The first track on Amy Winehouse's upcoming posthumous album 'Lioness: Hidden Treasures' is a cover of the 1963 song 'Our Day Will Come,' recorded when Winehouse was just 18.

Winehouse's website refers to 'Our Day Will Come' as a "reggae re-working" of the classic doo-wop song, but the arrangement isn't totally different from the version Ruby & the Romantics took to No. 1 nearly 40 years ago. The reggae groove is similar to the bossa nova beat of the original, and the horns are a subtle addition that doesn't substantially change the spirit of the song.

Winehouse sings about the joy of finding love for the first time: "Our day will come and we'll have everything / We'll share the joy falling in love can bring / No one can tell me that I'm too young to know / I love you so / And you love me."

Though Winehouse sounds good on the track, it's obvious she hadn't fully blossomed as a vocalist and didn't exude the confidence that radiated from later songs like 'Rehab' and 'You Know I'm No Good.' Taken for what it is -- a lost recording made when Winehouse was still a teen -- 'Our Day Will Come' is a welcome early glimpse of a star in the making.

Listen to Amy Winehouse, 'Our Day Will Come'