Greyson Chance sings.
Greyson Michael Chance ( born August 16 , 1997 ) is an American singer , songwriter , and pianist . His April 2010 performance of Lady Gaga 's `` Paparazzi '' at a sixth-grade music festival went viral on YouTube , gaining widespread attention and over 59 million views as of May 2017 , as well as an appearance on The Ellen DeGeneres Show shortly afterward . `` Paparazzi '' is a song by American singer-songwriter Lady Gaga from her debut studio album , The Fame ( 2008 ) .