Jonathan Mann (born April 9, 1982) is an American singer-songwriter, best known for creating and publishing a new song and video each day since January 2009, under the YouTube channel named "Song A Day." Because of his vast quantity of material and speed of composition, his songs often reference immediate current events and popular trends of the very day the video was uploaded. In November 2014, Jonathan Mann set a world record for the most consecutive days writing a song.