So at the end of the first song, I didn't know what the second song was.

NPR: Singer and Songwriter Neil Young

Other performers due to appear at the massive show include the Spice Girls, U2, and Madonna, while Jennifer Lopez will perform her new song Love Don't Cost A Thing for the first time.

BBC: Robbie Williams

The 23-year-old DJ released "Harlem Shake" last May, but it wasn't until Feb. 2 that the first video emerged featuring a silly dance to the song. (A YouTube denizen known as Filthy Frank gets that credit.) A version by a crew of Australian skateboarders established the jump-cut blueprint, and an entry by employees of Maker Studios, a digital media company, inspired other office imitators.

WSJ: Why the Harlem Shake Matters