She stopped by "The Ellen DeGeneres Show" and claimed—in a very genuine and believable way—that she is her man's biggest fan.
"I listen to his music probably more than I should. It's maybe slightly creepy," said Biel, 34. "I love his music. I'm literally probably [his] no. 1 fan."
The "7th Heaven" actress also explained that music has become a family affair. Their son, Silas, who turns 1 in April, is already showing early signs of musical ability.
While we're not surprised to hear that he has great taste and a knack for music, we are surprised by the baby's unique approach to making beats.
"[Silas is] very musical," said Biel. "He's really, really in love with Erykah Badu. He loves her music. He eats to her music. He's got just recently these drum sets. He likes to drum; he likes to play with his piano. And he likes to drum with his head… which I just think that's genius, if you ask me. That's genius level."
Silas might have his mom to thank for his taste in music just as much as his superstar daddy. Jessica told Ellen, "I went to probably 40/ 50 concerts when I was pregnant. I literally just stood there and the music was just slamming. I thought, 'I'm going to damage this child.'"
She clearly didn't damage Silas, AKA the coolest almost 1-year-old on the playground.
Jessica had plenty of jokes when the subject of pregnancy rumors came up. She says she is definitely not expecting a second one yet, but isn't letting the street chatter get to her.
"I know, isn't it exciting, guys?!" Biel joked. "I don't even know what to say about these things. I feel like, man, I thought I was doing good with my yoga practice. I thought I was in the gym, but no, I have a gut, apparently... Yeah, twins."
She kept the laughs coming with, "I heard that and I called Justin. I was like, 'Are we [having another baby?] No. Oh, okay. Cool. He usually knows more that I do about everything."
You can catch Jessica on "Ellen" Thursday, March 24.