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Justin Timberlake has a little smarty on his hands!

No, we're not talking about leftover Halloween candy...we're talking about his adorable 18-month-old son, Silas.

The 35-year-old singer stopped by The Ellen Show on Friday and couldn't help but gush about the little guy. "He's amazing," he told host Ellen DeGeneres. "[Jessica Biel] has two boys. She married one and we have one!"

Timberlake revealed the toddler already has a knack for singing and performing. And his song of choice? His daddy's, of course!

"He dances around the house. He's only 18 months, I don't know, but he keeps up with all the words to 'Can't Stop the Feeling,'" JT explained. "It's kind of crazy. I feel like I'm that guy who's bragging about his kid on national television, but he's kind of rad. He's pretty smart, you guys, he didn't get that from me."

Silas is also a big fan of daddy's new movie, Trolls

"I got to stream [Trolls] early for my son. He already knows all the characters. He knows like 12 characters," Timberlake gushed. "He's a genius, he really is. You can clap for him."

JT also played a little game of "5 Second Rule" with DeGeneres, hosted by special guest Mario Lopez

During the skit, Timberlake was able to name three of his friends from the Mickey Mouse Club (including Britney Spears!), the words he'd use to describe DeGeneres and how he "brings sexy back"—an answer that will totally make you swoon.

Check it out in the video below!