Celebrities Honor Amy Winehouse at 'Back to Black' 20th Anniversary Concert

• The 'Back to Black' 20th anniversary concert took place in London on Wednesday night.
• The concert featured performances by Mark Ronson, Jessie Reyez, Jorja Smith, and others.
• The event was held at the Roundhouse in Camden, a location significant to Amy Winehouse.
• The audience at the concert emulated Winehouse's iconic style with winged eyeliner and leopard print.
• The concert was a celebration of Winehouse's musical legacy and influence on modern music.