Christina Aguilera is "excited" to be expecting her second child.
The newly-engaged singer, who already has a six-year-old son, Max, with her ex-husband Jordan Bratman, will welcome her first child with fiancé Matthew Rutler later this year, and can't wait to expand her family.
A source close to 'The Voice' USA judge told UsMagazine.com: "(The pregnancy) wasn't expected, but it also wasn't unwelcome. They are all very excited though! Christina loves being a mom."
The insider insisted that Christina, who has yet to comment on her pregnancy, doesn't care whether the baby is a boy or a girl, and added: "They just want a healthy baby."
Production assistant Matthew, who met the blonde beauty on the set of 'Burlesque' in 2010 while she was going through her divorce, was planning to propose to the singer long before she got pregnant and began designing her engagement ring more than a year ago.
The couple announced their engagement on Twitter on Valentine's Day last Friday (02.14.14), two days after he popped the question in the backyard of their new home in Los Angeles, which is still under construction.
The friend said: "He wanted to do something that had meaning for both of them."
Christina was completely "shocked" by Matthew's romantic sunset proposal, for which he wore a suit and filled a gazebo with candles and red roses, before taking her to celebrate with friends and family.