Hollywood is never without its own best and worst categories. This time, take a look at few of the best celebrity makeovers of 2011.

Emma Watson

The "Harry Potter" star famous for her role as Hermione has completely altered herself in the fashion department. Her choices in wardrobe and hairstyle progressed from the first to the last premier of "Harry Potter." The British actress wowed everyone when she decided to chop off her long locks and sported a brave pixie cut. But nonetheless it paid her off greatly.

Jennifer Hudson

The singer actress probably has one of the best body makeovers in Hollywood. From a size 16, she amazingly dropped to size 6 last year and yet again continues to lose weight relentlessly showing off her sexier figure. Looks like time at the gym served Jennifer well.

Michelle Williams

From her typical "girl next door" look she sported for many years, Michelle Williams officially sealed her fashionista status when she stepped out in this year's Academy Awards with a bold, platinum blonde, pixie haircut. Now she looks more modern and sophisticated.

Kristen Stewart

The Twilight star often wears jeans, sneakers, and hoodies on her usual days. She's been criticized for her scruffy look and is judged looking less than a celebrity. But during premiers and appearances, Kristen Stewart proved that she can be just as polished and glamorous as any other stars.

Katy Perry

From her cartoonish outfits, over piled make up, and varying hair colors, Katy Perry looks more classy when she is simple. Lately these days the singer is sporting more natural fashion choices and simple yet smoldering make up.

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Actress Emma Watson arrives at the U.S. premiere of "Harry Potter and the Chamber of Secrets," at the Ziegfeld Theatre in New York on November 10, 2002. This is the second of the Harry Potter books by author J.K. Rowling which has been turned into a movie, and will open November 15.

Emma Watson at the the world premiere of "Harry Potter and the Deathly Hallows - Part 2" in Trafalgar Square, in central London. She dazzled in the tiered Oscar de la Renta gown with sparkling bodice.

Actress Jennifer Hudson poses for photographers at ShoWest in Las Vegas, Nevada March 16, 2006. Hudson received the award for Female Star of Tomorrow. ShoWest is an annual convention of movie theater owners and motion picture professionals.

Jennifer Hudson offered some practical dating advice at the American Music Awards.

This is the old hairstyle that she has sported since the start of her career in Dawson’s Creek with Katie Holmes.

Actress Michelle Williams holds her Hollywood Actress Award backstage at the 15th Annual Hollywood Awards Gala in Beverly Hills, California October 24, 2011.

Actress Kristen Stewart, one of the stars of the film "The Yellow Handkerchief" by director Udayan Prasad, poses as she arrives for the film's premiere at the 2008 Sundance Film Festival in Park City, Utah, Jan. 18, 2008.

Cast member Kristen Stewart poses at the premiere of "The Twilight Saga: Breaking Dawn - Part 1" at Nokia Theatre in Los Angeles Nov. 14, 2011.

Although her purple patterned dress nicely accentuates her figure and highlights her legs, the pattern is reminiscent of the '80s. The dress overwhelms the actress and does not compliment Stewart's pale demeanor.

Prior to the new do Perry rocked pink soft curls. She is seen here posing for photographers after winning Video of the Year for "Firework", Best Collaboration, and Best Special Effects at the 2011 MTV Video Music Awards in Los Angeles August 28, 2011.

Katy Perry announces the nominees for Album of the Year at The Grammy Nominations Concert Live - Countdown to the Music's Biggest Night event at Nokia theatre in Los Angeles November 30, 2011. The 54th annual Grammy Awards will be presented February 12, 2012 in Los Angeles.