Although Michael Jackson admitted publicly during his life only to having had one plastic surgery (on his nose), most experts and onlookers alike agree that he appears to have undergone many stages of physical transformation likely as a result of plastic surgery.
The world watched as Michael Jackson's face evolved over a multi-decade span of time until he was virtually unrecognizable as the same boy who first captured our imaginations in the 1960s and 70s. Whether or not we liked or approved of the changing face of Michael Jackson, it was undeniably fascinating to watch. Now that he's gone, it seems we are even more intrigued by every aspect of his life, his music, and yes, his face.
Of course, only Michael and his doctors know for certain what procedures he may have had. We can only speculate as to what amount and types of plastic surgery may have caused the transformation that happened before our eyes.