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Clad in a pair of comfy pajamas and surrounded by her giggling friends and family members, Ariana Grande held a livestream for her fans on Tuesday (October 28), during which she casually dropped a HUGE BOMB OF A REVEAL OMFG right at the top.

The "Love Me Harder" singer told viewers than she's excited for everyone to hear the song that she has recorded with Lorde and Diplo for the "Hunger Games: Mockingjay -- Pt. 1" soundtrack, saying: "It's a very interesting song. It's very different."

CUE FREAKOUT

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If you recall, the full Hunger Games: Mockingjay, Pt. 1 -- Original Motion Picture Soundtrack track list was revealed last week on October 21, with one giant, gaping hole right in the middle labeled "Various Artists -- 'Track 5.'"

With a little investigative work, you can rule Ms. Grande out of every other song on the 14-track album, except for that one.

Lorde addressed the missing track briefly on Twitter, explaining: "the unnamed track isn't that way because of secrecy's sake -- it's just not quite finished."

Well, the proverbial cat is out of the bag now! It sounds like Ariana Grande will be joining the likes of Kanye West, HAIM, Charli XCX, Tove Lo and more of Lorde's "heroes" when the disc drops this November.

The 21-year-old singer also promised that she'll be releasing a Christmas single this holiday season. No title has been revealed, although Ariana did say that it's "sort of about being fed up with Santa because he doesn't necessarily pull through all the time."