The Destiny's Child alum welcomed son Noah Jon with husband Tim Weatherspoon in January

Kelly Rowland welcomed her second son in January — and hasn't had a full night's sleep since.

Rowland, 40, recently stopped by PeopleTV and revealed in the "One Last Thing" segment that she's a bit behind on her rest with a newborn in the house.

"Uh, December? December," Rowland answered when asked the last time she got a full night's sleep. "Before Noah got here."

During the segment, she also shared that she makes up lullaby songs for her 3-month-old, son Noah Jon.

"We literally just make up lullabies for him," she said. "My mother used to do that with me, so I just continue to do that."

The Destiny's Child alum and husband Tim Weatherspoon welcomed Noah on Jan. 21. The couple also share son Titan Jewell, 6.

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Last month, Rowland shared a video on Instagram of herself crooning "A Bushel and a Peck" to little Noah.

"I Love you!......A Bushel & A Peck❤️" she captioned the sweet clip. "My apologies I've been a bit MIA on Social Media,But This is the little cocoon I've been in with Noah! I hope this makes you feel warm and fuzzy inside. Love to You All🤎"

Earlier last month, she shared a photo of the moment Noah met his big brother Titan.

"Flashback Friday to the day I brought Noah home to meet his big brother TITAN!" she wrote in the Instagram caption for a photo of the new family of four. "The level of excitement was THROUGH the roof! And watching my family multiply has been my hearts joy! So grateful for my circle of support yo help me through it all too, cause it's definitely a shift, but so worth it!"