As much as Lindsay Lohan and Hilary Duff tried, there was no celebrity rivalry quite like that of Christina Aguilera and Britney Spears. The two former Mickey Mouse Club co-stars both rose to fame around the same time (Aguilera's self-titled debut and One More Time were released in '99), seemingly took on more "adult" personalities simultaneously ("Slave 4 U" was released in '01, "Dirrty in '02), and made out with Madonna in the VMA's most memorable performance to date. And although the two pop icons have allegedly buried the hatchet (they both are living their own lives and raising children—it would be a little sad if they didn't), that doesn't stop the media (or late-night talk show hosts) from fishing for drama.
Last night, on The Tonight Show Starring Jimmy Fallon, Aguilera and the comedian played "Wheel of Musical Impressions." In between impersonating Cher and her Voice co-star Shakira, the "random" generator pulled up Spears' name. "You know Britney Spears, right?" asked Fallon. "A little bit, a little bit," laughed Aguilera. She then went into a dead-on impersonation of Spears singing "This Little Piggy." The best part about it all? There were no nasty jokes made—it was all in good fun.