Country star McCready, who shared a room with Peniche on Celebrity Rehab, has revealed the brunette beauty once told her about her sordid past.
McCready, tells the New York Daily News, "Did she say she'd been a madam? She sure did."
Her claims are echoed by author Mark Ebner, who alleges Peniche told him she "subcontracted" for madam Michelle (Nici) Braun. Braun pleaded guilty to money laundering and prostitution earlier this year (09).
Ebner says, "Kari Ann said that, unlike Nici, she'd only take 40 per cent of what a girl brought in."
McCready's accusations have also been backed up by bodyguard Joey Gonzalez, who claims Peniche attempted to hire him during her alleged time as a sex worker.
Gonzalez adds, "Kari Ann wanted to hire me to follow a girl who worked for her - who she said was skimming (stealing) money and stealing clients. I declined. But she bragged about how her girls could make $15,000 (GBP10,000) a month. She introduced me to one girl who told me she'd just gotten a boob job Kari Ann had paid for."
Peniche and her manager, David Weintraub, have declined to comment on any of the charges. Weintraub adds, "I don't know her whole past."
Peniche, who was briefly engaged to pop star Aaron Carter, recently insisted she is not part of the police investigation into alleged possible illegal activity surrounding the leak of the Rebecca Gayheart / Eric Dane naked romp tape, stating, "Nobody raided my house; I haven’t had any contact with LAPD."