Andy Cohen and Tamra Barney on December 31, 2010 in New York City. Credit: John W. Ferguson/Getty Images

Tamra Barney is all natural again--and she's eager to prove it!

During an appearance on Bravo's Watch What Happens Live Tuesday, the Real Housewives of Orange County star provided counsel to a 23-year-old caller considering breast implants.

Barney--whose own implants were removed on this season of RHOC--attempted to dissuade the caller from going bigger.

Host Andy Cohen interjected, joking that he loves "big tits"--at which point Barney, 44, shocked the Bravo exec by flashing her implant-free breasts.

"Tamra just showed me her bare breasts and they look great and they are a perfect size," a blushing Cohen explained to viewers (who weren't treated to the same private show he received).

Added the host, "I do love big tits and I have been to strip clubs and I do not like what big, fake boobs look like."

In January, Barney opened up to Us Weekly during a conference call about her decision to return to her natural, 34Bs.

"[With the implants] I felt like it was the first thing everybody looked at, or the first thing everybody noticed," the reality star explained to Us. "So, definitely, I feel a lot more confident . . . It's been just the best thing I've ever done in my life."