After the singing competition scrapped Xtina's original plans of singing with a hologram of the late icon Whitney Houston (executor Pat Houston said timing wasn't right), Grande made the star-studded set list and gushed about sharing the stage with The Voice coach on her timeline.
"Excited to share the stage with @ArianaGrande on tomorrow night's @NBCTheVoice finale," tweeted Aguilera (May 23). Grande responded and RT'd with a "beyond excited and honored ♡ !!!!!!!!!"
The Billboard cover star recently flaunted her impression skills on NBC's Saturday Night Live and The Tonight Show Starring Jimmy Fallon, nailing spot-on impersonations of Celine Dion, Britney Spears and her soon-to-be duet partner, Aguilera.
See photos of Christina Aguilera through the years:
Christina Aguilera through the years
Christina Aguilera and Ariana Grande to duet on 'The Voice'
THE VOICE -- 'Live Semis' Episode 817B -- Pictured: Christina Aguilera -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
Singer Christina Aguilera performs her hit song "Genie In A Bottle" accompanied by dancers at the 1999 Teen Choice Awards taping August 1 in Santa Monica. The award show, celebrating the hottest teen icons in film, television, music, sports and fashion was sponsored by Seventeen magazine and will be broadcast on the FOX television network in the United States on August 12.
Singers Britney Spears (L) and Christina Aguilera appear on stage at the MTV Video Music Awards in New York on September 7, 2000. Spears and Aguilera were both nominated for awards in the show.
Singer Christina Aguilera, pictured June 2, 2001 at the 2001 MTV Movie
Awards in Los Angeles, was nominated for two Latin Grammy awards,
including Best Record of the Year for "Pero Me Acuerdo De Ti" ("But I
remember you"), the Latin Recording Academy announced July 17 at a
press conference in Miami. The awards will be presented September 11
during a ceremony at the American Airlines Arena in Miami.
Singer Christina Aguilera poses as she arrives at the sixth annual
"Teen People" 25 Hottest Stars under 25 party in Hollywood May 5, 2003.
Aguilera was named to the list which features the top young stars in
film, music and television. REUTERS/Fred Prouser
Singer Christina Aguilera arrives at the 46th annual Grammy Awards show in Los Angeles, February 8, 2004. REUTERS/Fred Prouser FG/SV
Singer Christina Aguilera performs 'When You Wish Upon A Star' on stage at Disneyland's 50th anniversary celebration. Singer Christina Aguilera performs the Disney song 'When You Wish Upon A Star' at Disneyland's 50th anniversary celebration ceremony, at the Disneyland theme park in Anaheim, California May 5, 2005. Walt Disney, founder of the Walt Disney Company and visionary behind the creation of Disneyland, opened the park on July 17, 1955. REUTERS/Fred Prouser
Singer Christina Aguilera performs at the 2006 MTV Movie Awards taping at Sony Pictures Studios in Culver City, California June 3, 2006.
Christina Aguilera performs on ABC's Good Morning America in New York's Bryant Park August 18, 2006. REUTERS/Brendan McDermid (UNITED STATES)
Christina Aguilera holds her Grammy after winning Best Female Pop Vocal Performance for "Ain't No Other Man" at the 49th Annual Grammy Awards in Los Angeles February 11, 2007. REUTERS/Mike Blake (UNITED STATES)
Singer Christina Aguilera is interviewed as she arrives at the 'Africa Rising' Festival at the Royal Albert Hall, in London October 14, 2008. REUTERS/Alessia Pierdomenico (BRITAIN)
Singer Christina Aguilera arrives at the 2010 MTV Movie Awards in Los Angeles June 6, 2010. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Cast member Christina Aguilera waves at the premiere of "Burlesque" at the Grauman's Chinese theatre in Hollywood, California November 15, 2010. The movie opens in the U.S. on November 24. REUTERS/Mario Anzuoni(UNITED STATES - Tags: ENTERTAINMENT)
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The second episode of the two-part finale of The Voice airs Tuesday, May 24, at 8 p.m. ET.