But the design is so classic that it's super easy to find without resorting to dropping major cash for the Tom Ford original!
We found two equally affordable options that are super similar to Kate's dress.
Check 'em out ...AFTER THE JUMP!!!
Katy Perry gave it her all at the iHeartRadio Prism album release party in Burbank, CA last night, looking whimsically seksi in a custom Johnny Wujek creation.
The scintillating outfit featured a pale silver strapless bodysuit with a sheer A-line dress worn over it, which Katy paired with nude fishnet tights and platform Aperlai sandals!
A holographic belt matched her psychedelic mic stand and the handle of her microphone! We're totes sensing a theme here. LOLz!
Purple lips and eyeshadow completed the prismatic ensem!
Don't U love when outfits get literal? And Katy does it like no one else!
P.S. CLICK HERE to watch her performances!
[Image via John Shearer/AP Images.]