Oh, Hey, Mother Monster! Lady Gaga Surprises Apple Employees With an Electrifying Concert

Lady Gaga shocked Apple employees with an amazing performance on Friday. The 33-year-old singer stopped by Apple Park in Cupertino, CA, where she belted some of her most popular tunes, including "Born This Way" and A Star Is Born's "Shallow." In true Gaga fashion, she rocked multiple bright and colorful outfits, including a glimmering bodysuit and a voluminous green ensemble.

The event marked the official opening of Apple Park as employees of the tech company flocked to the venue when they heard Lady Gaga was the secret headliner. After her incredible performance, Apple CEO Tim Cook thanked the Grammy-winner for putting on such an amazing set. "Thanks to the incomparable @ladygaga for helping make our celebration unforgettable," he wrote on Twitter. He also honored the late Steve Jobs — who died from pancreatic cancer at age 56 in 2011 — adding, "We came together today, in the home you imagined for us, and celebrated your spirit. We love you, Steve."

Evidently, when Lady Gaga isn't busy rocking the red carpet (à la her stunning Met Gala appearance), she loves randomly surprising fans. Back in March, she showed up to a bar in Hollywood and gave a wonderful performance of Frank Sinatra songs. Mother Monster knows how to keep us on our toes! Look on to views clips and photos of her performance at the Apple event.

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