During a promotional pit-stop for his latest film “The Social Network,” Justin Timberlake took a break from his role as Facebook President Sean Parker and reverted to his musical roots. On “Late Night with Jimmy Fallon,” Timberlake and Fallon stormed the stage and took the audience through a history of rap. Starting with Sugar Hill Gang’s “Rapper’s Delight,” the duo covered such artists as Snoop Dogg, Tupac, Eminem, and MIA. The pair even put on their dancing shoes to do the Soulja Boy “Superman” dance. The piece ended with the two engaging the audience in a sing-a-long rendition of Jay-Z’s “Empire State of Mind.” For those who grew up in the ’80s and ’90s, this rap recap allows you to relive your high school and college years in four quick minutes, Roger Rabbit dance and all.  [via NYMag]