christina aguilera weight loss american music awards transformation 2012 2013 See Christina Aguilera's transformation from AMAs 2012 to AMAs 2013“Voice” coach and songstress Christina Aguilera has had a pretty good last 12 months, huh? Her transformation from the 2012 American Music Awards (above, right) to the 2013 American Music Awards (above, left) is … nothing short of amazing.

Not only has the pint-sized singer slimmed down, but she’s rocking a much more elegant look. We also love, love, love her 2013 AMAs performance of “Say Something” with A Great Big World. It too is in sharp contrast to her 2012 AMAs performance of a “Lotus” medley and “Feel This Moment” with Pitbull.

Not that those performances were bad, per se, but her “Say Something” was a highlight of the night for us.

It’s terrific how slim and trim she looks while not looking unhealthy. Whatever you’re doing, XTina, keep it up.