YouTube Sensations The Piano Guys Perform at Trump's Inaugural Concert: Watch

YouTube sensations The Piano Guys performed at Donald Trump's "Make America Great Again" welcome concert Thursday night (Jan. 19).

The quartet's first song was a rendition of One Direction's 2011 hit "What Makes You Beautiful," where all four men used different parts of the piano -- from playing the traditional keys to plucking the inside strings and drumming on the wood. The group then told the Lincoln Memorial audience we need to "unite our hearts, our minds, our voices as one," launching into their song "Okay" (3.8 million views on YouTube).

This is the first time a group born on YouTube has performed at a presidential inauguration concert, and considering Trump's affinity for social media, they're a fitting choice. Watch the performance above.

President Donald Trump Inauguration