Lady Gaga would have made John Lennon proud with her astounding performance of his beloved song "Imagine."
-- who sat behind a floral piano -- left the massive crowd at Azerbaijan's Baku Olympic Stadium speechless during her cover of the 1971 hit at the opening ceremony for the 2015 European Games.
Like her Sound of Music medley at the 2015 Oscars
, Gaga got a little operatic during her performance. "What an honor to have a few moments with the world watching," she Instagrammed prior to taking the stage. "Could you imagine. What would you say?"
After her performance, she gushed over the crowd's reaction. "I had such a great time with the audience," she wrote. "It felt like we were in my bedroom singing songs and imagine life was more simple."
The 2015 European Games began on June 12th and will end on the 28th. During the event, 6,000 athletes from the continent will compete in 20 total sports, including cycling, badminton, table tennis, beach soccer and archery.