The singer showed off her shorter tresses on Twitter, writing, "Just went shorter!!!! only the best from @RiawnaCapri at @NineZeroOne."
"It was definitely not planned," Riawna Capri, co-owner of Nine Zero One Salon, told E! News of the bob haircut. "[Demi's] flying out today, and wanted it before she left."
So, which celeb inspired Demi's new look? "Demi loved the texture of Julianne Hough's old haircut. She wanted to recreate that texture on her," Capri says.
"Demi and I collaborated together about the cut. I wanted to give her something no one else has." That's when "The Demi" was created.
"It's short on one side, and longer on the other side. One side is about 3 inches longer than the other side," Capri explains. "The short side touches her shoulder, and the long side goes just past her shoulders. It's that perfectly disheveled hair."
Looking at her TwitPic, Demi is ready to rock her new 'do! "She was so pumped, she loved it," she tells us of Demi's reaction.
We love it -- what do you think of her hair makeover? Sound off!