Brunette bombshell Kim Kardashian underwent a hair-raising transformation for her recent appearance on a new reality series.

The Hollywood socialite posted pics on her blog of a prosthetic face that was placed on her for her appearance on the new E! series Secret Celebrity. Kim, who also stars on E!’s unscripted hit Keeping Up With Kardashians, appeared on the show Tuesday night –along with singer Nick Lachey — in a bid to see if she could walk amongst her fans without them recognizing her!

It took a team of seasoned Hollywood makeup artists three hours to take Kim K from knockout headturner to a frumpy understudy for Ugly Betty!

“This was a real process… I needed to get a molding of my face so I could have a prosthetic nose, cheeks, and neck put on! I look like a completely different person! My name was Cynthia…after my cousin Cici!” Kim writes of the stunt.

Check it out: