Plenty of sources describe what JBR was wearing but no one as yet has described how she came to be wearing so much bling.
This Denver Post article covers all the bling.
https://extras.denverpost.com/news/ram1014k.htm.
"When he examined JonBenét's body, Boulder County Coroner John Meyer noted she was wearing a long-sleeved, white knit shirt with a silver star embroidered on the front, and a gold necklace with a cross on it. Her blond hair was in two ponytails and she wore a yellow metal band on her right middle finger, a yellow ID bracelet that bore the name "JonBenét'' on one side and the date 12/25/96'' on the other side.
On the palm of her left hand, someone had drawn a red ink heart.
According to Det. Linda Arndt, who witnessed the autopsy, green Christmas garland, like the garland decorating the spiral staircase in the house, was tangled in her hair.
JonBenét was wearing long underwear, and beneath the long underwear was a pair of white panties with printed rosebuds and the words "Wednesday'' in the waistband. There were urine stains and several red stains. According to a search warrant affidavit, Dr. Meyer told Arndt the stains looked like blood.