Katie's looking sexier than ever in Armani!

Katie Holmes has gone back to Armani!

She's wearing a very revealing -- and very sexy -- silvery, beaded, strapless, bare-back Giorgio Armani bubble dress and silver heels at the premiere of "Mad Money."

And what an accessory!

Hubby Tom Cruise is with her, and the duo is causing all kinds of commotion and red carpet madness in Westwood.

Photo credit: WireImage