Watch: Kanye West and Jay Z Rock the Stage at SXSW.

It was a Watch the Throne reunion in Austin, Texas last night.
Rappers Kanye West and Jay Z hit the stage together at the SXSW Music Festival in Texas Wednesday night for a two-hour show sponsored by Samsung.
"There was two stages. There was one up front. Both of the stages elevated like an elevator," a concertgoer told E! News. "They performed their new remix for 'Drunk in Love.' Beyoncé was on the track, but she didn't come on stage."
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 Diddy and Tyler the Creator were among some of the celebs that attended the show.
"Tyler the Creator, showed up right after Kanye," source tells E! News. "He said, ‘Oh my gosh I got to leave, I'm about to be on stage." (The star never actually performed due to the tragedy that occurred.)
The concert was an especially big treat to Samsung cell phone users. E! News was told, "If you had a Samsung Galaxy, you could get a wristband for the concert, and you could bring someone who didn't have a Samsung phone."

Additionally, "If you ran out of battery, you'd tweet #PowerOn, and they'd bring you a battery in line."

 
The duo performed a selection of hits from their Watch the Throne collaboration throughout the night, including "No Church in the Wild," ''N---as in Paris," ''Who Gon Stop Me" and "Otis."
Each rapper also gave the fans some of their individual tracks, too. West performed "Black Skinhead" and "New Slaves" from his latest album Yeezus along with older singles like "Jesus Walks" and "Runaway."
Meanwhile, Hov took on "Tom Ford" from Magna Carta Holy Grail, and then hit 'em with the classics—"99 Problems," ''Empire State of Mind," ''Dirt Off Your Shoulder" and "Big Pimpin'."
At the end of the show, 'Ye and Jay did what they were famous for during their Watch the Throne tour.
"After they finished, the lights went out for awhile, and the crowd kept chanting 'encore!'" the insider tells us. "Then we heard Kanye say, ‘Jay doesn't want to leave.‘ Then, Jay Z said, ' 'Ye doesn't wanted to leave,' and they performed a song. Then, the crowd went wild, and they performed it a second time after that!"