Many Americans have heard of Kimberly Guilfoyle ... have also remarked on how Guilfoyle is unrecognizable from the days of her marriage to Newsom, sending plastic surgery rumors buzzing.

They both recently endured public break-ups, which featured their ex-partners quickly moving on with other people.

Donald Trump Jr. and Kimberly Guilfoyle have reportedly broken up. See photos of the couple throughout ... later marrying Eric Villency before divorcing in 2009. Since the beginning of their ...