A woman was stabbed at Art Basel -- the world famous Miami art show attended by the likes of Kylie Jenner, Lenny Kravitz and Leonardo DiCaprio -- and onlookers thought it was part of the act.
According to the Miami Beach PD ... a fight broke out near an exhibit by artist Naomi Fisher and a woman was stabbed in the neck and arms. Reports say one witness thought the blood was part of a performance art act.
Even after cops responded ... some thought the police tape was part of the show.
Cops say the suspect was arrested and the victim was treated for non-life threatening injuries.