Jessica Biel has a "slightly creepy" obsession with Justin Timberlake's music.

Justin Timberlake and Jessica Biel

Justin Timberlake and Jessica Biel

The 34-year-old actress is a huge fan of her husband's work and tries to play his albums to their 11-month-old son Silas as often as possible.

She admitted: "I listen to [Justin's] music probably more than I should. It's maybe slightly creepy. I love his music. Silas loves his music. I want him to hear it a lot. We listen to it in the car a lot.

"I went to probably 40-50 [of his] concerts when I was pregnant. I stood there and the music was just slamming. I actually thought, 'I'm going to damage this child!' "

The 'Devil and the Deep Blue Sea' star thinks her young son is already showing signs of following in the footsteps of his 35-year-old dad.

She told talk show host Ellen DeGeneres: "[Silas is] very musical. He's really, really in love with Erykah Badu. He loves her music. He eats to her music.

"He recently got these drum sets. He likes to drum, he likes to play his piano, and he likes to drum with his head like this. I just think that's genius. That's genius level."

Elsewhere during the interview, Jessica laughed off recent speculation she is pregnant with the couple's second child.

She said: "I don't even know what to say about these things.

"I feel like, I thought I was doing good with my yoga practice. I thought I was in the gym, but no, I have a gut apparently."