Justin Timberlake, Gabrielle Union

Ellen's friend and one of the biggest stars in the world, JUSTIN TIMBERLAKE is bringing sexy back! From playing 12 days mascot "Big Gin," to surprising Ellen on her 2,000th show, the multi-Grammy-winning musician, restaurateur, entrepreneur, and a Hollywood actor is back with Ellen and we couldn't be more excited! He's here to tell us all about his animated film, "Trolls," and the music he wrote and performed for it.

Then, actress GABRIELLE UNION is here to spread some love with Ellen. She's here to talk with Ellen about her film, "Almost Christmas."

TGIF, today on Ellen!