The couple made headlines on Tuesday after Crystal shared a throwback pic on Instagram of their son, SJ's, birth -- causing fans and friends to jump to conclusions and congratulate them on their newest addition, without reading the caption.
"Let me clear something up," Ne-Yo told ET's Denny Directo during a Facebook Live interview on Wednesday. "We're only five months [pregnant], guys. We still got a little time... but I do appreciate how eager everybody was to hit us with the congratulations."
With three kids and one on the way (baby No. 4 is his second with Crystal), the singer knows a thing or two about fatherhood. But as he admitted to ET, welcoming a new baby doesn't get any less stressful.
"Every single time is like the first time. It's definitely a labor of love, I'll say that," revealed Ne-Yo, who said he was hoping for another girl to "even it out."
"[My son] Mason at least has my sister's son. They partner up and play all the time. And [my daughter] Maddie is kind of by herself, and I wanted to give her a little sister just to have some camaraderie," he explained. "She was actually broken up about it not being a girl. She wanted a sister, but I broke it down for her. Like, 'Now you got three little henchmen, and they gotta do what you told them to.'"
Ne-Yo's sons, on the other hand, couldn't be more excited. "Especially Mason. SJ is still kind of young. He doesn't really know what's going on, but Mason is digging it," he gushed.
As for whether any of his kids will follow in his musical footsteps, he said they're entertaining him "all day long." "I felt like I was going to have to kind of push them towards it a little bit, but no. They sing and dance all day long. Everything they do is a song," he shared.
For now, Ne-Yo is focusing on his own performance as Sage Odom in Step Up: High Water, which is executive produced by Channing Tatum and Jenna Dewan Tatum.
"Jenna was actually the person to call me for it in the first place, and told me what was going on and asked me to be a part of it," he revealed. " Thank you very much, Jenna, because it was a fantastic experience."
"Everybody knows about the Step Up movies and they are known for their amazing dance sequences. I feel like we've elevated it to the next level with this series. This one is very much more story and character based. The dancing is definitely there -- we couldn't not do the dancing -- so definitely tune in for the dancing, but stick around for the stories and the characters," he explained. "There's some drama in there, there's some suspense."
Step Up: High Water is available now on YouTube Red.