He's just using a different stain varnish.

Shut up people, with your “WTF's” and you “EW's”… Maybe he ran out of his normal shade of foundation and didn't have time to run to the store before the event… shit happens.

Did you people ever heard from vitiligo? It's an illness and everything else than WTF or EW. The skin is losing its pigmentation and there is nothing you can do. And yes, Michael Jackson had the same illness, too. I think it's really brave of Sammy Sosa to show his light skin after all the pigmentation in his face is gone. Read more here.. http://en.wikipedia.org/wiki/Vitiligo

That can happen if you are mixed like a lot of Dominican people are. If you are really tan, you can look like the first picture, and then when you are lighter, the camera flash can wash you out. I have similar pictures of myself.

Another possible motivation for the skin change — some kind of Witness Protection thing?

Whiteface is never acceptable.

He looks freaky black in the first picture, and freaky white in the second. I can't decide which he should be.

Either he has Michael Jackson Syndrome or he saw and loved Twilight.

i thought that was him front row at the latin grammys.