The Piano Guys turn radio pop into lovely neoclassical pieces. It's easy on the ears, and sorta amazing to watch.
Here's their version of One Direction's "What Makes You Beautiful"...
Source: youtube.com
..and here's their take on David Guetta's "Titanium"
They tossed in a bit of cello and elements of Gabriel Fauré's "Pavane" for this one.
Source: youtube.com
They also have also recorded an arrangement of Coldplay's "Paradise" incorporating elements from African music...
Source: youtube.com
...and a lovely cover of Bruno Mars' "Just The Way You Are"
Source: youtube.com