Each of the men is dad to two kids.
The 'Sexy Back' singer is celebrating the new era of President Joe Biden and Vice President Kamala Harris.
Lady Gaga, Jennifer Lopez, Justin Timberlake, Tom Hanks, Demi Lovato, Garth Brooks and more will be part of the festivities on Jan. 20.
Tom Hanks will host the 90-minute special.
The superstar confirms the news that he and wife Jessica Biel welcomed a second child.
The singer secretly welcomed his second child with wife Jessica Biel last year.
Justin Timberlake also makes a cameo in this heartwarming special.
The film will premiere globally Jan. 29 on Apple TV+.
Check out some of ET's top new music picks of the week!
Timberlake heard about his fellow Tennessean, who has become a local celebrity because of the way he spreads joy.
Fallon discussed what he would buy Timberlake for Christmas, while promoting his new children's book, '5 More Sleeps 'Til Christmas.'
ET spoke with the 'Tonight Show' host about his new children's book and pal Justin Timberlake's new baby!
Lance Bass confirmed Justin Timberlake and Jessica Biel welcomed their second child earlier this year in a chat with ET's Katie Krause.
Lance Bass confirmed to ET that the couple welcomed a second baby earlier this year.
