Christina's looking a little different these days

Is it just us, or does Christina Aguilera look ... a little different?

The 31-year-old singer’s changing visage isn’t a new topic of conversation, but her performance at a Michael Jackson tribute concert over the weekend in Wales left people buzzing more than ever.

The way we see it, her fuller-figured appearance could be due to a number of things. For example, a highly unflattering ensemble could be to blame (let’s face it: the leotard and matted weave that would make Sally Struthers proud wouldn’t exactly suit anyone).

Or it could be her tabloid-making lifestyle (she and her BF Matt Rutler, 26, are often snapped stumbling out of nightclubs, and the singer was arrested in March for public intoxication).

Whatever the reason, Xtina should probably stay away from fishnets for a while.

Follow Style/Buzz/Special Sections Editor Perrie Samotin on Twitter: @PerrieWS