In a year that saw Taylor Swift shine in glittery frocks, Diane Kruger wow at the Inglourious Basterds premieres and Zoe Saldana strut in a cavalcade of gorgeous dresses for her Star Trek and Avatar promotional tours, 2009 was a memorable year for some of the red carpet’s newest faces. But what about the all-stars?

Sienna Miler and Sarah Jessica Parker are the ones I usually count on to make the premiere and award show carpets pop. Their impressive fashion choices usually land these women on the best-dressed lists, but this year, one too many underwhelmed me. Let’s take a look at some of my picks:

Sienna Miller at the Tokyo premiere of G.I. Joe (August): The Brit beauty is known for galvanizing the boho chic trend, but at this premiere, she ditched draped and billowy and instead went for a shiny snakeskin suit by Gucci. Snakeskin as an accent? Love it. Full-on snakeskin? No thank you.

Sarah Jessica Parker at the Oscars (February): The woman who plays Carrie Bradshaw usually can do no wrong—I love seeing her on the red carpet in sleek L’Wren Scott sheaths or even that glitzy, yet appropriate Nina Ricci gown she wore to the premiere of Sex and the City: The Movie. But this Christian Dior Haute Couture dress was unfortunately more Princess Cupcake than princess.

Leighton Meester at the American Eagle flagship store opening (November): She may not have been around as long as Miller and Parker, but Meester has certainly created a formidable presence on red carpets. Here, the worst offense was the overdone makeup. Smokey eyes and bold red lips? It’s too much on its own, and looks even less flattering when paired with her saucy Paule Ka leather dress. But if it’s any consolation, this get-up is award-winning compared to the outfit she wore later that night while performing.

Some other reliable fashionistas who let us down in ’09? Renee Zellweger for her gothic Golden Globes dress by Carolina Herrera, Sandra Bullock’s swirly Lanvin number at the All About Steve L.A. premiere in August (nix the booties!), and Rihanna’s Dolce & Gabbana suit from the May Costume Institute Gala that mixed menswear and sharp shoulders to disappointing results. Seriously, those shoulders could knock someone out!

What do you think, PopWatchers? What other normally fashionable stars disappointed you this year?

Photo: Miller: Junko Kimura/Getty Images; Parker: Tony DiMaio / Retna Ltd; Meester: Rob Kim/Retna Ltd