Social media loves lip-syncing couple

A Valentine's Day lip-sync has sent Cupid's arrow straight through the heart of social media.

Kristin and Danny are married parents of two from Indianapolis, Indiana... who happen to be great at driveway sing-alongs.

Their latest video is going wildly viral, with more than 21 million views and counting on their Facebook page.

Over the four and a half minute video, the couple takes on some of the most popular love songs of the decades, complete with costumes and props.