Gangnam Style, MC Hammer at AMAs: Psy performs with MC Hammer at American Music Awards (VIDEO)

(KNXV) - One of the most talked-about moments Sunday at the American Music Awards was a mash-up between two superstars you may not immediately think to pair together: South Korean rapper Psy and MC Hammer.

Their dance medley was a combination of Psy's big viral hit of the year, "Gangnam Style," and Hammer's "Too Legit to Quit" from 1991.

"That was so awesome," Psy told CNN.

Psy started the performance with just his backup dancers, and Hammer surprised the audience by joining in halfway through to end the show.

Many people in the crowd were seen dancing along, especially to Psy's signature moves.