Welcome to the Skin Colour Alteration Convention in honor of Michael Jackson!
Looks like she lightened her hair, but not her skin. Those bright stage lights will wash out some color on any photo. There are some photos from back in the day where she's darker, but people with darker complexions tan too. So unless you know something I don't know, I don't think she pulled a Michael Jackson... or a Sammy Sosa for that matter.(check those before & after pics... creepy.)
