When faced with insurmountable hardship, sometimes the only solution is to have a little fun.

That's exactly what the people in the video above are doing. When Amy's ovarian cancer came back in October 2013 and turned out to be resistant to treatment, her family knew that their time with her would be limited, according to the video. They made the decision to enjoy every moment, and made this flash mob as a tribute to her.

The description on the video, uploaded by Vimeo user cnoellsch, says:

"Amy has been an indelible force in the lives of so many people; as we all bare witness to her pain, I wanted to find a way to remind her how surrounded she is by support."

So the day before her 56th birthday, 50 of Amy's friends and family gathered from up to five different states to perform for her and make her smile.

"We don't know exactly how much time we have left together," the text in the beginning of the video says. "But what we do know is that being in present in the moment is of the utmost importance."

The joyful surprise is made even better by Amy's priceless reaction.