Nashville season 3, episode 18, “Nobody Knows But Me,” finds the city and its people about to be rocked by none other than the Queen of Pop herself, Christina Aguilera!

Last week we lost Sadie as she decided the best thing after shooting her ex was to leave town. This included leaving her potential romance with Luke. Meanwhile Rayna was able to help Juliette through childbirth until Avery could be there to help bring his daughter into the world. We still don’t know her name!

Related: Nashville season 3, episode 17 recap: Goodbye Sadie?

Read the official synopsis for Nashville season 3, episode 18, “Nobody Knows But Me,” below to see what happens next:

“With the arrival of his former fiancée in Nashville, Jeff finds himself face-to-face with Jade St. John (played by Christina Aguilera). A powerhouse pop-star in Nashville on tour, Jeff is forced to revisit his past and work with the woman who once played a large role in both his personal and professional lives. Meanwhile, Deacon continues to cope with his cancer diagnosis – a secret that weighs heavily on his family — especially Maddie, who struggles with the news herself.  While Juliette is eager to get back to work following the birth of her daughter, she quickly finds balancing motherhood and a music career challenging to say the least, while Avery struggles with his own responsibilities and his Triple Exes band-mates.”

The guest cast includes Christina Aguilera as Jade St. John, Aubrey Peoples as Layla, Ed Amatrudo as Glenn Goodman, David Alford as Bucky Dawes, Keean Johnson as Colt Wheeler, Monica Plante as Natasha, Kyle Dean Massey as Kevin Bicks and Nick Jandl as Dr. Caleb Rand.

Related: Nashville star Nick Jandl discusses love triangle and more

You can also check out some pictures from Nashville season 3, episode 18, “Nobody Knows But Me,” below:

Check back later tonight for the full recap of tonight’s episode of Nashville!