Mike Tompkins (b. 1987) is a Canadian musician and YouTube star from Ilderton, Ontario. He primarily records a capella covers and original songs, using only his mouth and voice. He has been featured on both the Today Show and The Ellen DeGeneres Show.
In 2015, the Muppets appeared in a YouTube video with Tompkins to perform an a cappella cover of Echosmith's "Cool Kids." (YouTube)