Four people testified Wednesday that they know the girl who is in the sex tape that’s at the center of the R. Kelly child pornography trial.

Simha Jamison says her best friend was the female having sex with singer Kelly in the infamous sex tape.

Both women were born in 1984. Jamison puts her friend at about 13 or 14 years old in the video.

From fourth grade until their late teens they were best friends. They played basketball together. They rode bikes nearly everyday. Jamison said in her testimony “I kind of know her like the back of my hand,” when referring to the identity of her friend.

Jamison says the tape circulated around their Oak Park High School.

The alleged victim’s uncle and his ex-wife testified, too. They say their niece is the girl in the video. But the defense upbraided the ex-wife, who is a Chicago police officer, for not turning in the tape immediately to her department.

Kelly’s lawyers say the tape is a phony and that the family was looking to get paid. The alleged victim also denies it’s her in the video.