We love Sandra Bullock. Love her.

But what was up with her hair at the "All About Steve" premiere in Hollywood (below, right)?

Those roots? That frizz? We are used to seeing Sandra looking smokin' hot, so what happened here?

See the photo in the gallery below, plus more stars who missed the mark:

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Hair Raising Star Styles
Even Hollywood's biggest stars have a bad hair day once in a while. See which celebs shocked us with their unfortunate 'dos.
Carlos Alvarez, Getty Images - Jon Kopaloff, FilmMagic
Phil Walter, Getty Images

Hair Raising Star Styles

    Sandra Bullock
    Sandra wowed us when she went pageant-glam for Miss Congeniality and kept up the sex appeal for years (left). However, at the Hollywood premiere of "All About Steve" on August 26th (right), Bullock's hair looked frizzy and frazzled--not to mention those roots!

    Carlos Alvarez, Getty Images | Jon Kopaloff, FilmMagic

    Kellie Pickler
    Kellie's chic medium-length bob is a refreshing look from other big hair country crooners. Despite her trendy new 'do, she can't resist overdoing it with the hairspray and teasing.

    Dimitrios Kambouris, WireImage

    Jada Pinkett Smith
    Please tell us this mullet chop job is for a movie. When Jada's hair is slightly grown out, shiny and sleek, its easy to see why she and her hunky hubby are considered one of Hollywood's most stylish couples.

    Steve Granitz, WireImage.com | Johnny Nunez, Startraksphoto.com

    At her best, Katherine Heigl successfully channels Veronica Lake. But with too much product, her locks are dingy: No self-respecting bridesmaid would ever leave the house with hair that looks like it was inspired by "There's Something About Mary".

    Alexandra Wyman, WireImage.com

    Christina Aguilera
    Only Bo Derek could be a perfect "10" in cornrows. Her new mommy makeover included trading her Dirrty 'do for Marilyn Monroe-inspired platinum blonde waves

    WireImage.com

    Victoria Beckham
    Posh pioneered the blunt bob trend -- and it suits her no-nonsense fashion style perfectly. In this uptight up-do (r.), she looks like she's taking her reputation as an ice queen a little too seriously

    Ethan Miller, Getty Images

    Paris Hilton
    Despite her privileged background, Paris has a hard time pulling off the sophisticated debutante look. A flirty asymmetrical bob works better for L.A.'s biggest party girl

    Dimitrios Kambouris, WireImage.com

    Katie Holmes
    Katie's tousled tresses make her look like she's playing dress-up. Her Posh-inspired bob and bangs are picture perfect Hollywood Wife.

    Kevin Mazur, WireImage.com

    Mary-Kate Olsen
    She's known for her eccentric style, but Mary Kate's Marc Jacobs' headband is less modern fashion icon, more Jane Fonda (circa 1982).
    Tousled blonde tresses are better on a 22-year-old, no matter how many millions she's got

    Dimitrios Kambouris, WireImage.com

    Fergie
    Hey, Fergie -- Bret Michaels wants his look back. The star is far more Glamorous when she wears her honey hair wavy and free.

    Jeffrey Mayer, WireImage.com