Pregnant chanteuse Christina Aguilera was the picture of radiance when she took to the stage at yesterday's KIIS FM Wango Tango concert in Carson, California. It was a nice way to ring in Mothers Day and she looked really happy. The only thing she could do with is toning down on the tan because her hands looked a little too tangoed and it was too big a contrast from her face! For the performance, she joined pop group A Great Big World for their hit single 'Say Something.' The next time Aggy performs on a stage like this, it will be her OWN hit single (hopefully). I can't remember the last time this has actually happened but I look forward to the new album after she gives birth to her daughter this Autumn.