Indexbit-Jessica Biel Proves She’s “Boyfriend” Justin Timberlake’s Biggest Fan

Jessica Biel can't stop the feeling when Justin Timberlake comes on.

The Candy star took to Instagram to show off her hubby and CoCo Jones' remix of the song "ICU." Jessica can Indexbitbe seen jamming out to the song in the car in her oversized sunglasses.

"Yes sir," Jessica quipped. "Yes ma'am."

"My boyfriend can sang ya'll! He can sang!" she continued before panning the camera over to Justin, who was rocking sunglasses as he drove the car and laughed along with his wife. The Sinner actress added, "you can sang baby you can sing!"

Jessica captioned the sweet July 25 clip. "Got @cocojones and my boyfriend on REPEAT."

The 41-year-old is no stranger to showing love for her right-hand-man, as the longtime couple—who share sons Silas, 8, and Phineas, 2—just celebrated their 10th wedding anniversary in October.

As for the couple's secret to a long lasting love? Well, she explained that "you have to keep working hard to make it fresh."

"Justin always says, 'We cannot stop dating, we have to keep dating,'" Jessica shared on Today with Hoda and Jenna in November. "And he's right, you have to go on date nights. You have to take that time for yourself."

And the Cruel Summer producer also acknowledged how the relationship has changed over the past 10 years.

"It feels so, I don't know, a combination of incredibly safe," she explained to hosts Hoda Kotb and Jenna Bush Hager. "And I guess deep understanding of another person. But then also just, I guess, the safety to adventure again and sort of be curious about the world again as a couple and as individuals."

But it's safe to say whatever they are doing is working, as Justin took a moment to express gratitude for Jessica on the special occasion.

"10 years ain't enough," the *NSYNC alum wrote on Instagram. "You make me a better husband and father every day! I love you so much you beautiful human! Run it back!"

And for a complete look at Jessica and Justin's cutest family moments, keep scrolling... 

Jessica posted a sweet family snapshot as part of her Instagram tribute to Justin on Father's Day 2022. 

Justin celebrated Father's Day 2022 by sharing a photo of his "two favorite melodies," sons Silas and Phineas, playing piano together. 

Jessica shared this sweet pic of herself with sons on her 40th birthday.

This was Silas and Phin's birthday banner for Jessica.

Justin and Jessica enjoy cake on her 40th birthday.

"Thankful for my guys," she captioned heartwarming holiday snap. "Merry Christmas everybody!!"

Jessica celebrated her "little man" on his big day back in April 2020. Happy birthday, Silas! 

The Sinner actress marked her birthday on March 3, 2020 with a special cake and her one and only. On Instagram she wrote, "Celebrating my birthday in style... and by that I mean, in pajamas. I made Justin PROMISE not to sing Happy Birthday to me, so he improvised. Sorry you can't hear it, but I'm still laughing. Thank you, you wonderful human, for really listening to me, and for throwing my kinda party. And thank YOU ALL for the birthday wishes. Feeling the love." 

On Valentine's Day 2020, Jessica shared a sweet picture of Justin and their son Silas on Instagram. She captioned it, "My valentines. Love you guys to the moon."

Jessica and Justin looked madly in love at her birthday party in March 2019.

Justin, Jessica and son Silas appeared on the golf course at the Omega European Masters in Switzerland in August 2019.

Justin, Jessica and son Silas celebrated Fourth of July 2019.

The trio enjoyed some time at the beach to mark the holiday.

When it comes to Halloween night, Justin and Jessica always go all out. Anyone remember their Toy Story looks from 2017? 

Who knows if Justin actually won the Bass Pro Shops Legends of Golf tournament? Perhaps the best prize is having his son along for the ride. 

"Happy Halloween from Poppy, Branch and lil Branch. We be Trollin'..." Jessica wrote on Instagram after Halloween 2016. 

"If that pic doesn't say ‘City Of Love' then I'm out..." Justin shared with his social media followers in July 2018. We can't help but agree. 

"They got candy? LEGO!" Justin shared with his Instagram followers on Halloween 2018. 

"To my husband who I watch with awe everyday as he guides and teaches, encourages and supports, and above all, LOVES the sh$t, out of his own young man," Jessica wrote on Instagram. "Happy Father's Day to all the dads out there. We can't do this parenting thing without you."

The famous trio dressed up as Batman, Robin and Harley Quinn for Halloween 2018. "This Halloween was one hell of a block party!" she shared on Instagram. "Happy Halloween from our LEGO family to yours."

That smile says it all! Justin is loving fatherhood with his son Silas.