If you think the perfect summer movie involves romance, not robots, then chances are you'll be seeing Monte Carlo instead of Transformers this weekend. The fairy tale-like flick, which takes place in France and then Monte Carlo (duh), features some seriously amazing designer clothes. And the rom-com's three co-stars -- Selena Gomez, Katie Cassidy and Leighton Meester -- have been stepping out all week in chic duds of their own while promoting the film. So who looked the most stylish?

Justin Bieber's girlfriend, Selena Gomez, 18, wore a ruffled purple dress with nude pumps at a press event in New York City.

Katie Cassidy, 24, channeled her Gossip Girl days in a figure-hugging ivory sheath dress with neutral pumps and simple gold jewelry for an appearance on Good Day New York.

PHOTOS: See what Katie wore to this year's MTV Movie awards

Leighton Meester, 25, went for a Carven off-the-shoulder printed dress with a slim belt, a YSL Chyc Cabas tote and strappy Alexandre Birman sandals. In related news, the Gossip Girl star recently snipped blunt bangs and darkened her hair color.


Which Star is Most Stylish?

Selena Gomez
Katie Cassidy
Leighton Meester
2751 Total Votes
Which Star is Most Stylish?