Almost a week after announcing her engagement, Christina Aguilera has more exciting news to share... she's pregnant!

[related]Aguilera, 33, and her fiancé Matthew Rutler, 29, are said to be thrilled at the news.

“They’re very much in love and are really excited to take this next step!” a source close to the pair told PEOPLE.

The popstar and production assistant met in 2010 while working on the set of Burlesque and have been an item ever since.

This will be the second child for the Voice US coach. Aguilera already has a son, Max Liron, 6, with ex-husband Jordan Bratman.