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It’s been quite a year for Princess Beatrice! Last April, she made headlines when she showed up to her cousin Prince William’s wedding with a ribbon fascinator perched atop her head, an accessory that went on to launch endless conversation and more than 40 Facebook groups. (Eventually, she auctioned it off for charity.) Ever since, the York princess—with the help of her trusty new stylist, Charlie Anderson—has stepped up her style, whipping out couture outfits one after another. Click through the gallery to see for yourself.

MORE:
• 11 Most Memorable Royal Moments
• Meet the Hat Designer: Philip Treacy
• The Kate Middleton Look Book

What happened in 2011? Princess Beatrice‘s fascinator went viral, Rihanna made a case for sheer clothing, and Demi Lovato pulled a Kriss Kross and wore her gown backwards. See the biggest celebrity style risks of the year in the gallery now.

MORE:
• The Prettiest Dresses of the Year
• Hottest Trends of 2011
• Biggest Style Moments of the Year

Need a fun D-I-Y idea for Halloween? Try Princess Beatrice’s royal fascinator! Here’s how to make it in three easy steps:

WHAT YOU’LL NEED:
2 metal headbands, wired pink ribbon, glue gun (all available at M&J Trimming, 212-204-9595).

HOW TO:
1. Stack two metal headbands, with bottom ends of one on curve of the other, and glue them together.

2. Wrap wired ribbon around top headband until completely covered; glue down both ends.

3. Create two bows (leave ends hanging) and secure both to top of headband by wrapping a piece of ribbon around knots three times and gluing end down.

COMPLETE YOUR LOOK:
Rim your eyes in black, don a pastel day suit, and slip on this haute couture headgear!

For more inspiring hat ideas, click through the hottest hats at the Royal Wedding. 

MORE HALLOWEEN:
• The Easiest Costume Ever
• What Celebrities Wore Last Year!
• Movie & TV Halloween Costume Ideas
• Katy Perry’s Costume Secrets
• Stars at the Pumpkin Patch

— Jenni Radosevich, InStyle designer and part-time blogger for ISpy-DIY.com

Lady Gaga was in London this week, where she paid a visit to celebrity milliner Philip Treacy. “Just another day in England having tea and hats with my darling friend Philip Treacy. Mint Blonde at Jonathan Ross,” the pop star tweeted. Gaga picked up some new headgear at Treacy’s studio, including a rose-shaped fascinator and a dollar-sign-topped hat, which she debuted during a Notting Hill shopping spree. Fun fact: Philip Treacy also created Princess Beatrice‘s famous royal wedding topper.  Click through the gallery to browse more of the Irish designer’s fanciful creations!