*The child pornography trial of R&B star R. Kelly continued in Chicago Tuesday with opening statements from both sides and a screening of the infamous sex tape at the root of the case.        

       Shauna Boliker of the Cook County state's attorney's office told the jury that Kelly produced and starred in the sex video with a girl who was underage at the time of the filming.      

       "You will see the sex acts he commands her to do," Boliker told the jury. "Vile, disturbing and disgusting sex acts, actions that were choreographed, produced and starred in by Robert Kelly."      

       "The case will unfold before you frame by disgusting frame," she added, with the girl "doing what she's told. There's no feeling in her face. It is clear she is an underaged girl" whom Kelly met when she was 12.

       But lawyers defending the 41-year-old artist said the 26-minute tape shows neither Kelly nor his alleged victim, and where the video came from remains a mystery.

       "Robert Kelly is not on that tape," said defense lawyer Sam Adam. "There isn't an original of this tape. The tape you're going to see here is at best a copy of a copy of a copy of the original." Adam said the FBI reviewed the tape and could not identify Kelly as being on the tape.

       The video, which prosecutors say was made between January 1998 and November 2000 when the girl was 13 or 14, was played in the courtroom. The man's face is visible only a few times but he can be seen handing the girl money and heard giving her commands.      

       Kelly is charged with 14 counts of videotaping, producing or soliciting child pornography. The Grammy winner faces up to 15 years in prison if convicted of all charges.