The Nitty Gritty Dirt Band sings that song.
Hum - Stars
Lovesick: Christabelle & Lindstrom
Metric
The song is by Iggy Azalea
The band's name is Phoenix. The song is called "1901".
Lindstrom & Christabelle - Lovesick
The band Sid (シド) sings this song
Agadoo is by Black Lace.
johnny cash
The French band PHOENIX. The song is 1901, and they're actually saying "fold it" ;) -Alicia
Ozzy.Source: black-sabbath.com's FAQ