Nicole Richie, daughter of U.S. singer Lionel Richie, has reportedly fired her personal stylist over concerns about trust.

The 25-year-old co-star of "The Simple Life" has ended Rachel Zoe's 2-year tenure as her personal stylist, and one source claimed that trust was behind the controversial fashion guide's dismissal, Us Weekly reported.

"Nicole didn't trust Rachel anymore," said a friend of Richie's of last Tuesday's firing. "Zoe didn't take the news well."

A representative for the stylist, whose fashion efforts have focused on size-zero actresses Mischa Barton and Lindsay Lohan, has claimed that the split of the former confidantes was amicable.

Us Weekly said that to fill the 35-year-old's fashionable spot, Richie has hired actress Jessica Biel's stylist, Cristina Ehrlich, to find her an outfit for the upcoming American Music Awards.