Ice queen alert! So, Lauren Conrad does NOT look like this anymore

Whether she was rocking an Alice band, a long sleek bob or a head of beachy waves, Lauren Conrad generally remained pretty consistent when it came to her hair colour.

Warm honey tones tended to be the order of the day for the former reality TV star, but it looks like she's decided to go all Taylor Swift at the Met Gala if a recent Instagram preview is anything to go by.

While the 30-year-old Laguna Beach-native herself has yet to unveil her new look to her five million followers, Kristin Ess – Lauren's stylist – has teased the transformation on her own Insta page, and people are OBSESSED.

Uploading a shot of a coy-looking Lauren sporting platinum-blonde tresses, Kristin wrote: "Got to spend this morning with my human doll @laurenconrad and some of my fave ladies at @enews@cinalin @iamcattsadler {hair by me & makeup by @amynadinemakeup."

 "Just a bunch of hard working ladies making the world go round," she added in the post which has clocked up more than 8,000 likes since its upload this weekend.

The stylist's followers were all over Lauren's icy-blonde look, with one writing: "The perfection that is Lauren Conrad" and another commenting: "Lauren's new look is mesmerizing."

Ladies? We sense a hair appointment coming on…