Kelly Clarkson had better learn some lullabies.

The songstress is expecting her first child with new hubby Brandon Blackstock.

"I'm pregnant!!!" she announced via Twitter on Tuesday night. "Brandon and I are so excited! Best early Christmas present ever :)."

She also shared the news on Facebook.

Meanwhile, during an interview on NBC's "The Tonight Show" last week, the 31-year-old "American Idol" Season 1 winner laughed off Jay Leno's questions about rumors of a pregnancy, but said the two were "trying, trying, trying ... like rabbits."

Clarkson, 31, and Blackstock, a talent manager, wed on Oct. 20. He has two children from a previous marriage.