The 33-year-old 'Drunk In Love' hitmaker made the admission during the final night of the couple's On The Run tour, reported People magazine.
She said to her husband in front of a packed stadium of 81,000 people in Paris, "I'm your biggest fan."
He responded saying, "It's been an honour and a pleasure to share the stage with you. I couldn't dream for anything else (than) to be in this stadium with the woman I love, who I believe is the greatest entertainer of our time. I love her. She's my wife."
"We love Paris. It's special to us because we got engaged here and this is where baby Blue was conceived," he added.