This week in beauty we learned how to flu-proof our make-up bags, got some pretty extreme costume inspiration from YouTube and saw Ann Romney take a walk on the wild side -- with her nails at least.

With all that beauty-obsession (and our own love of makeup) in mind, we're taking a look at This Week In Beauty. We're showcasing the best, worst and most interesting examples of hair, makeup and nails that we came across this week. Take a look, get inspired and vote for your faves!

Loading Slideshow...
  • BEST: Solange Knowles

    Solange has been<a href="" target="_hplink"> killing it lately</a>. Seen here at the American Ballet Theatre Opening Night for Fall 2012, she kept it classic with a matte red lip, sleek hair and a subtle smokey eye. Watch out, Sasha Fierce!

  • WORST: Emma Stone

    Normally we love Emma Stone's <a href="" target="_hplink">quirky style</a>, but we thought her look at the 19th Annual ELLE Women In Hollywood Celebration could have used a bit of tweaking. A<a href="" target="_hplink"> mod look</a> could totally work for Emma but the Twiggy-esque eyelashes came off a little overdone when paired with bangs and eter pan collar. Next time less is more Emma!

  • BEST: Robyn Lawley

    We all know Robyn is <a href="" target="_hplink">a total babe</a>, but the simple and classic look she wore to the American Ballet Theatre Opening Night for Fall 2012 somehow made her even more radiant. Robyn turned up the drama with her brunette waves, but she kept it fresh and pretty with a light pink lip, defined eyebrow and just a dab of eyeliner. Work it, Robyn!

  • WORST: Sarah Hyland

    Although we liked that Sarah took a risk with her makeup and tried something new at the Nylon's October IT Issue event, it still felt a little off. Don't get us wrong we like a daring <a href="" target="_hplink">goth look</a> but Sarah should have eased up on the eyes and focused on the dark lips.

  • BEST: Lucy Liu

    Always keeping it classy and simple, the "Charlie's Angels" actress went almost <a href="" target="_hplink">bare-faced</a> to the "Connecting The Dots" by Donna Karan book launch. Lucy looks gorgeous au naturale, so she just accented her complexion with a peachy blush and pale pink lip gloss.

  • WORST: Lea Michele

    At the 19th annual ELLE Women In Hollywood Celebration, Leah had a make-up look that dropped just as many jaws as her visible <a href="" target="_hplink">undies</a>. The seasoned <a href="" target="_hplink">red carpet poser</a> seems to have lost her touch. When you use so much bronzer that you can see your undereye concealer, it's probably not the best look. If Lea wanted to be a natural glowy effect, she could have achieved it with a little less bronzer, lighter eyeliner and a bright coral lip.

  • BEST: Naomi Campbell

    Naomi Campbell is still a <a href="" target="_hplink">stunner</a> at <a href="" target="_hplink">42</a>, and certainly flaunted her stuff at the presentation of the Capital Group skyscraper in Moscow. She looked flawless with blunt bangs, silky long hair, glowing skin and sultry red lips.

  • WORST: Leslie Mann

    Funny girl, Leslie Mann, always makes us smile but her look at the 19th Annual ELLE Women In Hollywood Celebration was a bit of a downer. Leslie is so naturally pretty that she doesn't need excessive eyeliner. If she'd trim a couple inches off her hair and applied a little less makeup, she would be a vision. Next time, Leslie!

  • VIDEO: Makeup Artist Bobbi Brown Interview

    StyleCaster interviews makeup artist Bobbi Brown about how she went into makeup, which makeup she uses everyday and women role models.

Want more HuffPost Style beauty content? Check us out on Twitter, Facebook, Tumblr, Pinterest and Instagram at @HuffPostBeauty. (For everything else check out our main HuffPost Style Twitter, Tumblr, Pinterest and Instagram @HuffPostStyle.)