Beyonce surprised University of Southern California students when she was spotted on campus..
Bey could be seen trying to stay covered up in a green jacket while weaving her way through the crowds with the help of security.
The singer was said to be practicing for her upcoming Super Bowl 50 halftime show with her squad.
"Her dancers were dancing and rehearsing," a source tells E! News. "They blocked everything down and the windows so nobody could see."
