In today's Viral Video of the Day, a group of boys turned an ordinary elevator ride into an unforgettable surprise when they broke into song.

In the clip, the boys wait inside the elevator until four older people step in, then suddenly start singing Billy Joel's The Longest Time.

The strangers couldn't believe what they ere witnessing, and they were stunned by how good they sound.

"Awh they picked the perfect couple and they recording them as well so sweet," one viewer commented.

Check it out:

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