This video of a 14-year-old Amy Winehouse singing 'Happy Birthday to You' is heart-wrenching

Watching a teenaged Amy Winehouse singing her heart out is making us a little teary over what was and what could have been.

In a vintage clip from the late singer's upcoming documentary, Amy, the 14-year-old future superstar is shown singing 'Happy Birthday to You' at a friend's party.

She already had her diva moves down…and she looks so bubbly and healthy. Watch the clip above.

The singer died in 2011 at 27 of alcohol poisoning. Amy will be released in Australian cinemas on July 2.