Ellen DeGeneres surprised her guests with a special gift on her talk show earlier today.

Justin Timberlake jumped out of a human-size gift box and walked out to an audience full of screaming grown women who sounded more like teenage girls.

During his conversation with Ellen, he gushed over his marriage to actress Jessica Biel, who he dated for four years before walking down the aisle with her in October 2012.

J.T. calls her his best friend.

"Every once in a while I can catch a glimpse of her when she doesn't see me looking, and I have this moment where I'm like, 'If you never make a good decision ... if you only make bad decisions for the rest of your life. You made one really good decision,'" Timberlake said.

"Because she's just like -- it's nice to marry your friend. It's nice to marry your best friend. It suits me."

'The 20/20 Experience' creator brought more joy with his live band the Tennessee Kids and his four backup singers -- dressed in suits -- to perform his single, 'Mirrors.'

His crew bounced back and forth to the track and even moved up next to him to sing towards the end of the song. J.T. then walked into the audience aisle to sing to the smiling faces.

To finish his set, Timberlake also did a live performance of 'Pusher Love Girl,' assisted by backup dancers showcasing some pristine footwork.

Watch Justin Timberlake Perform 'Mirrors' on 'The Ellen DeGeneres Show'

Watch Justin Timberlake Perform 'Pusher Love Girl' on 'The Ellen DeGeneres Show'