Andi Dorfman and Kaitlyn Bristowe made a special appearance on the late-night program, where they helped predict Viall's final four.
2016 is now behind us! Click through the gallery to see how the celebs celebrated New Year's Eve.
Trump has yet to respond to O'Donnell directly, but he did send a message to his 'many enemies' in a New Year's tweet.
'The Bachelor' premieres Monday, Jan. 2 on ABC, but the network teased some drama Sunday night!
The 'Grey's Anatomy' star is already obsessed with her sweet baby boy!
The 'Dancing With the Stars' pros may be hinting that their first child is officially on the way!
The singer's manager continues to slam Dick Clark Productions, while a source tells ET that Carey is also upset with host Ryan Seacrest.
A source tells ET the rumored new couple left the venue together holding hands.
ABC's 'Countdown to Nick' special might have given fans a big spoiler!
The jury's still out on whether fourth time's the charm for Nick Viall, but he definitely has a wide variety of women (and aquatic animals?) to choose from.
The two superstars were spotted ringing in 2017 together.
On day after Fisher's death on Tuesday, her mother, Debbie Reynolds, died of a suspected stroke.
The couple is expecting their son to arrive on Monday.
