Lady Gaga Paid Tribute to Steve Jobs and Performed on Giant Rainbow Stage in Apple Park

Lady Gaga caused a minor stampede at Apple's headquarters in Cupertino, Calif. when she took to a giant, rainbow-covered stage for a surprise set on Friday (May 17).

The event, which marked the formal opening Apple Park, featured Gaga as a secret headliner — and when Apple employees found out that she'd be performing in the middle their campus, they dropped what they were doing and ran towards the colorful archways that had been constructed in the center  the grassy expanse.

Wearing a cerulean wig and neon pieces pulled from the costume closet her Enigma residency in Las Vegas, Gaga played through a number her greatest hits, including her award(s)-winning "Shallow" from A Star Is Born. She also paused for a moment silence for Apple founder Steve Jobs, who died from complications following pancreatic cancer in 2011.

Apple CEO Tim Cook thanked Jobs in a heartfelt message he posted after the event, and thanked Gaga for "making our celebration unforgettable."

Check out Gaga performing "Shallow" in Apple Park below.