Today marks Meredith Vieira's final morning on "Today" -- and Matt Lauer and the rest of the crew just sent her off with a massive musical goodbye.

Meredith Vieira
Set to the tune of Journey's "Don't Stop Believin'," Lauer, Ann Curry, Al Roker and even Abe Vigoda all took part in an epic lip-dub at Rockefeller Plaza, ending with a special appearance by Jimmy Fallon!

Meredith was extremely happy, emotional and we're guessing a little bit winded after running through the entire office and out into the Plaza, while surrounded by co-workers wearing t-shirts saying "____ Loves Meredith."

Vieira, who is leaving the show to spend time with her family, will be replaced by newsreader Ann Curry ... and correspondent Natalie Morales will be bumped up to Curry's old spot.

Watch the entire video above!