"Ocean Eyes," an early Billie Eilish track first released way back in 2015, received a special rework Monday night on The Late Late Show.

During a special segment, guest host Alicia Keys noted the presence of her collab-ready piano before the two launched into a rendition of the career-launching track. "I mean, I didn't bring this thing here for nothing," Keys, who's a "big fan" of Eilish's work, said. 

Eilish also joined Keys and comedian Ali Wong for a game of "Taller or Shorter," as well as a couch chat about the continued prevalence of "Ocean Eyes" covers and her appreciation for Keys' music. See all that up top and below.

Next year's Keys-hosted Grammys ceremony marks a historic one for Eilish, as the WHEN WE ALL FALL ASLEEP, WHERE DO WE GO? artist is the youngest to ever be nominated in the "Big Four" categories: Album of the Year, Record of the Year, Song of the Year, and Best New Artist.

Speaking with Jimmy Kimmel last month about her nominations, Eilish said that—due to the extremely early timing of the nominations announcement—she was asleep when the news first broke.

"Every year, my family and me, we would all sit in the living room and watch the Grammys," she added. "We never missed it. The fact that I'm the same little girl watching that in my living room and then I'm still in that same living room being nominated for six, like, what is that?"