Overview

• Madonna's 'Celebration' tour kicked off its US leg at Brooklyn's Barclays Center, where she brought her boyfriend, boxing coach Josh Popper, onstage during a performance of her hit 'Vogue'.
• Popper, who has been romantically linked with Madonna since early this year, trained her 18-year-old son, David Banda, at his Manhattan gym Breadwinners.
• The concert started three hours late due to technical issues during sound check, according to a source close to Madonna.
• Madonna's children, including David Banda and her 11-year-old daughter Estere, also participate in the show, with Banda playing guitar and Estere working the runway during 'Vogue'.
• The 'Celebration' tour, which marks Madonna's 40th anniversary in music, began in London in October and will wrap up in Mexico in April.