Then, a judge from the hit talent competition "The X-Factor," L.A. Reid is here! He's telling Ellen about the electric season of the show, and what it's been like working with Britney!
Then, it's the Korean pop sensation who’s taking YouTube by storm! His video for his song "Gangnam Style" has made him an icon, PSY is here in person to perform it on the show!
Plus, an adorable mother-and-son dance team made a video of themselves dancing to Psy's unstoppable track, and they're here to perform it!