Sometimes, the difference between a best and worst style star, is merely one key accessory. Fashionista Rachel Bilson chicly added tan, roll over boots to her simple ensemble, achieving a look that is sure to be copied! Ana Ortiz, on the other hand, ill-fatedly added grey leggings, instead of black, to her patterned frock, which resulted in a not so hot look.

PHOTOS: See Pete Wentz, Britney Spears, Alicia Keys, Eva Longoria Parker, Ana Ortiz, Alexandra Richards, The Jonas Brothers, 50 Cent, Rutina Wesley, Rachel Bilson, Chloe Sevigny, Katie Holmes, Kristin Cavallari, Pamela Anderson And Sir Ian McKellen In The Best And Worst Of Friday's Fashions!

How did Sir Ian McKellen achieve best dressed status? Check out the gallery to find out!

PHOTOS: See More Best And Worst Fashion!

• TAGS

• Style
• 50 Cent
• Alexandra Richards
• Alicia Keys
• Ana Ortiz
• Britney Spears
• Chloe Sevigny
• Eva Longoria Parker
• Katie Holmes
• Kristin Cavallari
• Pamela Anderson
• Pete Wentz
• Rachel Bilson
• Rutina Wesley
• Sir Ian McKellen
• The Jonas Brothers

Style Scene: Best And Worst Of Friday's Fashions

• TAGS

• 50 Cent
• Alexandra Richards
• Alicia Keys
• Ana Ortiz
• Britney Spears
• Chloe Sevigny
• Eva Longoria Parker
• Katie Holmes
• Kristin Cavallari
• Meta: Pete Wentz
• Pamela Anderson
• Rachel Bilson
• Rutina Wesley
• Sir Ian McKellen
• The Jonas Brothers