Tom Cruise really put the squeeze on his wife Katie Holmes last weekend in L.A. -- copping a SNEAKY feel of her ass at a Katy Perry concert -- and TMZ has obtained the hands-on footage.
Katie got the pat-down Sunday night at Nokia Theater -- and we're told, Tom's hand remained steadfast for most of KP's performance.
Side note: never invite Tom and Katie to your party ... we're told the couple's entrance delayed the concert a solid 15 minutes.
And watch closely -- standing next to the touchy-feely couple is none other than Katy Perry's hubby ... Russell Brand. What a handful.
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