So this summer is getting off to a bumpy start for Ms Aguilera. The 33years old expectant mom, shared a picture of her growing baby belly on Twitter over the weekend and captioned it “Happy 1st Day of Summer!”. Notice how she's stylishly plugging Eos lip balm? Christina is expecting a daughter with fiancé Matthew Rutler. The singer is already mom to 6-year-old son Max from her previous marriage to Jordan Bratman. Best wishes to you and your babies Xtina!