Dramatic Celeb Hair Makeovers of 2012

Right before her performance at the MTV Video Music Awards in September, Lovato showed off her new solid blond highlights.

The singer and judge of "The Voice" added purple highlights to her platinum blond layers in August.

After going solid blond in August, the star took to Twitter to unveil her punky pixie crop a few days later.

The actress debuted a chin-skimming bob on the set of her new film Safe Haven in late June.

In June, the actress traded her long strands for a shorn buzz cut for her role in the upcoming film Mad Max: Fury Road.

The singer switched her deep brunet for a sunny blond hue in June.

The natural blond debuted a cool brown shade at the CFDA Fashion Awards in June.

In late April, Princess Charlene of Monaco traded in her shoulder-length blond strands for a sleek crop.

The 29-year-old actress chopped off her long, flowing waves in favor of a short pixie in early April. The recently-engaged star made the severe change to play the role of Fantine in the upcoming movie "Les Miserables," set to debut in theaters December 2012.

In late March, the actress traded in her cinnamon shade for a honey blond hue -- a look she previously worked while filming the "The Amazing Spider-Man."