Little girls light up when they hear dad's guitar

Everyone thinks their baby is the cutest, but these baby twins really are the cutest.

Nothing makes these 11-month-old twins happier than the sound of their dad strumming on his guitar during dinnertime. And it makes them really, really happy.

This adorable video was one of the biggest viral hits of 2012. The twins were still dancing one year later in 2013, and still dancing another year later in 2014.

We're due for 2015's dancing update any week now...