It's a conspiracy! Partners in style crime Jessica and Ashlee Simpson kept it casual (and a bit boho) while celebrating Ashlee's 25th birthday at the Wet Republic pool at the MGM Grand Hotel/Casino in Las Vegas.

While their attire is pool-side appropriate, I would've preferred to see the girls in something more flattering and, in Jess's case, less grandma.

Have something to say about this daring style? Sound off in the comment section below.

Photo: Ethan Miller/Getty Images