Jessica Simpson might have a new addition on the way!

The pop singer, who's married to NFL player Eric Johnson, is allegedly pregnant with her third child.

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Sources at Radar Online say Jessica and Eric have been "in baby-making mode for months" in an effort to add to their brood, which includes Maxwell, 4, and Ace, 3.

In Touch previously reported the 36-year-old might've been trying for baby No. 3 after sporting a small bump while out and about early October.

"When she and Eric returned home, a number of Jessica's friends noticed how bumpy and thick around the middle she looked," a friend exclusively revealed. "And she really has that glow."

Click through the slideshow to see photos of Jessica and Eric's children!