Baby No. 2 on way for Ne-Yo, wife Crystal Smith

Ne-Yo's wife Crystal Smith is pregnant with the couple's second child.

The R&B singer announced the exciting news on Instagram with a sweet collage of his three kids and a question mark in the fourth slot.

"Sooooooo.....

guess who's awaiting a NEW ARRIVAL!?!

????????????????????????????????????????????????????

@itscrystalsmith and yours truly are happy to announce we are expecting??!," he wrote.

In his second post, the 38-year-old singer uploaded a picture of him kissing and hugging his pregnant wife.

The couple, who got married in February 2016, also has a one-year-old son, Shaffer Jr.

The 'Miss Independent' hit maker has two other children, daughter Madilyn Grace and son Mason Evan, with ex-fiancee Monyetta Shaw.