Rapper 50 Cent made a surprise appearance during the Lil Wayne -headlined America’s Most Wanted Music Festival last night (August 14) in Anaheim, California.

50 Cent took to the stage as a guest performer during a performance with Atlanta rapper Soulja Boy during the stop at the Honda Center.

The appearance is notable because the two rappers have traded disses on various mixtape and album tracks over the past several years, including a recent track titled “Play This On the Radio.”

Other artists that performed or made appearances during the evening included Young Jeezy, Teyana Taylor and Rihanna.

50 and Soulja Boy’s cozy relationship was revealed earlier this week, when MTV.com reported that the Queens-bred rapper bought the young emcee a studio tour bus for his 19th birthday.

“50 gave me a bus to record my album since I was on tour,” Soulja Boy told MTV.com during a stop on the America’s Most Wanted Music Festival.

The move could cause tension with headliner Lil Wayne, who has a history of sending subliminal messages towards 50 Cent, although Soulja Boy admitted he was simply trying to steal the show each night on the tour.

“I try to strive for my best. I respect everybody in the tour, likewise, but I’m trying to have the best show in the tour,” Soulja Boy said.