PIC: Lauren Conrad Rocks Newly Dyed, Hot-Pink Ponytail

Lauren Conrad poses at the book signing for her new book "The Fame Game" at Barnes & Noble bookstore at The Grove on April 24, 2012 in Los Angeles, California. Credit: Jon Kopaloff/FilmMagic

Lauren Conrad worked her signature California girl glow at her book signing in L.A. Tuesday and gave her blonde hair a very colorful makeover.

Thanks to the 26-year-old Fame Game author's hairstylist, Kristin Ess, the star debuted pink-dyed ends blown out into bouncy waves and styled in a perky ponytail.

"Trying to convince Kristin Ess to dye my tips fuchsia for tonight's book signing…" the Hills alum tweeted hours before debuting her new candy-colored 'do via Instagram. "My Little (pink) Pony!" she wrote along with the pic.

Pink-dyed ends aren't the star's first experimentation with bright hair color -- in July, she streaked pink, purple and blue shades throughout her blonde mane and in January, she accented her signature "fun bun" hairstyle with cotton candy pink.