Barbara Corcoran Nice S.I. Cover, Martha ... I Can Be A Swimsuit Model, Too!!!

Anything Martha Stewart can do, Barbara Corcoran can do just as well ... 'cause the "Shark Tank" star just had her own makeshift Sports Illustrated swimsuit photo shoot -- and she looks fantastic!!

The 74-year-old real estate mogul and businesswoman threw on a white one-piece suit and orange cover-up to recreate her friend's new S.I. cover that was revealed this week ... captioning the pic, "I can’t cook, but I sure can swim. @si_swimsuit @marthastewart48."

The responses have been nothing but positive ... with huge names like Lindsay Lohan, Paris Hilton, Chrishell Stause and Martha herself all showing love in the comments.

"Looking great barbara Corcoran!!!!!" Stewart, 81, said.

There was one troll, however ... and anyone who's familiar with the Sharks will not be surprised one bit that "Mr. Wonderful" had something to say.

"I've reported this to Instagram," Kevin O'Leary said ... to which Barb responded, "Ok hater."

Barb's post was all for fun -- earlier this week, she even joked with us that she wouldn't buy the mag if Martha looked too good.

TMZSports.com

The magazine is now on sale ... and unfortunately for Barb fans, she won't be in it -- but at least they can enjoy her own take on the cover!!

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