Pharrell Williams & Gwen Stefani Close Out We Can Survive Concert - Watch Now!

Gwen Stefani keeps it fierce in black while striking a pose backstage during the 2014 CBS Radio We Can Survive Concert held at the Hollywood Bowl on Friday (October 24) in Los Angeles.

Later in the evening, the 45-year-old entertainer made a surprise appearance during Pharrell Williams‘ closing set at the cancer benefit concert.

PHOTOS: Check out the latest pics of Gwen Stefani

Pharrell and Gwen wowed the crowd while performing their smash hit “Hollaback Girl.” Pharrell also performed his hits, such as “Happy,” “Get Lucky,” “Come Get It Bae,” “Beautiful,” and “Blurred Lines.” Watch the video below!

15+ pictures inside of Gwen Stefani and Pharrell Williams performing at We Can Survive concert…