LOS ANGELES - The trial of the doctor charged in Michael Jackson's death opens with a bit of star power and the one thing the King of Pop enjoyed throughout his life - a worldwide audience.

Prosecutors plan to call the superstar's friend and choreographer, Kenny Ortega, as their first witness in the case, which enters a crucial final act today with opening statements and the start of testimony.

Authorities contend Dr. Conrad Murray, who is charged with involuntary manslaughter, administered a lethal dose of the anesthetic propofol along with other sedatives, and lacked the proper lifesaving equipment to revive Jackson in June 2009.

The defense says Murray was Jackson's friend, a capable protector of the singer's health, prepared to travel with him to Europe, and is still mourning the death.