Ne-Yo expecting second child with wife Crystal Smith

Oct. 26 (UPI) -- Ne-Yo is "happy" to be expecting his second child with wife Crystal Smith.

The 38-year-old singer, born Shaffer Smith, announced in an Instagram post Wednesday that Smith is pregnant with another son or daughter.

"Sooooooo..... guess who's awaiting a NEW ARRIVAL!? @itscrystalsmith and yours truly are happy to announce we are expecting! #NewAddition #ExtendingTheFamily," he wrote.

Ne-Yo already shares 19-month-old son Shaffer Jr. with Smith, and is also dad to 6-year-old son Mason and 6-year-old daughter Madilyn with ex-partner Monyetta Shaw. Smith also shared the news on her own account.

"We didn't plan for you but you are Gods plan and I thank you for choosing us to be your parents! Impatiently awaiting our newest addition," she wrote. "WE'RE PREGNANT!!! @neyo (I think he did it on purpose) joking! LOL #ThePlatinumLife #ThePlatinumFamily."

Smith said in an interview with E! News that she and Ne-Yo have yet to learn the sex of their child, but are "all set" on baby names.

"We are so excited!" she gushed. "This definitely wasn't in the plan and we weren't trying at all!"

Ne-Yo and Smith married in February 2016 outside Los Angeles. The couple and their family appear on the new E! series The Platinum Life, which airs Sundays.