"Nobody Knows But Me" guest starring Christina Aguilera - With the arrival of his former fiancee 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 bandmates, on Nashville, airing Wednesday, April 15th on ABC.