We're Not Impressed, Kristen

Yikes.

Kristen Bell got it all wrong at the London premiere of Burlesque Monday night.

The blonde actress wore a Stella McCartney floral print dress that was way too short and made her butt look HUGE.

Also we’re not digging the pleats on the back, especially when she turns to the side.

Overall, not a good look.

[Image via WENN.]