demiboy460.jpgCourtesy: Twitter

Demi Moore is showing off her bikini again ... but it's not on her body this time. Ashton's wife has brought in 19-year-old Dave Days ... a YouTube celebrity who is known for doing impersonations on the web.
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Days tweeted, "So Demi Moore asked me to do a parody... of herself. In her bikini. Yeah. Don't ask." He added, "Ashton wasn't so happy."

We don't buy it for a second that Ashton didn't love the spoof. No doubt, the Punk'd creator was in on it, too.

To keep the joke going, Moore, 47, gave her approval of Days by tweeting, " I think U wore it better!"

Wouldn't be surprised if Mr. Kutcher decides to work the two-piece next. We have to admit, that would be hot!