Greatest Hits: Watch Ariana Grande's Whitney Houston Tribute, Plus 10 Other Season Finale Performances

By Andy Swift
Greatest Hits Finale Videos Courtesy of ABC

ABC pulled out the big guns for Greatest Hits' live (!) two-hour (!!) season finale, beginning with a tribute to one of the greatest voices of all-time.

Scroll down to watch all of the evening's performances, save for a few that weren't blessed to us by Twitter:

* Ariana Grande kicked off Thursday's broadcast with a high-energy performance of two Whitney Houston classics, "How Will I Know?" (1985) and "Queen of the Night" (1993):

* Next, American Idol runner-up Adam Lambert renewed the audience's "Faith" in George Michael's 1987 pop hit:

* Five members of New Edition followed this up by dusting off their dancing shoes for a medley of the group's greatest hits:

* Co-host Kelsea Ballerini then joined Sheryl Crow for a duet of her 1994 jam "All I Wanna Do":

* Next, En Vogue reminded the audience that — as far as the group's collective lovin' is concerned — we're "Never Gonna Get It." (Video will be added when it becomes available.)

* The second half of the finale began with an emotional performance of "My Heart Will Go On," which Celine Dion dedicated to her late husband:

* This was followed by a well-intended Run-D.M.C. tribute, courtesy of Flo Rida:

* Changing the pace up a bit, Richard Marx took the stage next, performing his 1987 hit "Don't Mean Nothing":

* The audience was then pulled "Down Under," courtesy of Men at Work frontman Colin Hay:

* And John Legend was on hand for a dual performance of Lauryn Hill's "That Thing" and "Ex-Factor." (Video will be added when it becomes available.)

* The finale's penultimate performance was an unexpected duet of "All Star" with Smashmouth and... country star Hunter Hayes?

* Dion aside, I would argue that Greatest Hits saved its biggest hit for last. Ladies and gentlemen, Nelly's "Hot in Herre":

Which Greatest Hits finale performance was your favorite? Drop your pick(s) in a comment below.

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