In 2015, she returned in the TV Series "Hôtel de la plage", aired on France 2, where she played herself as a guest in an episode. She made her debut on stage 22 June 2015, with the play "Cabaret Deret" played to the Théâtre de l'Atelier alongside Jean-Claude Deret, Zabou Breitman, Shirley & Dino, Myriam Boyer, Christine Murillo, Olivier Breitman, Les Mauvais élèves, Antonin Chalon, Antoine Larcher and Vadim Sher. In July 2015, she made a concert to the Francofolies de La Rochelle still with Mathieu Boogaerts. The 22 July she made a concert to the Paléo Festival. In September, Luce is preparing a special concert with Philharmonic where she will covered songs, including Cole Porter, Ella Fitzgerald or Frank Sinatra with the conductor Zahia Ziouani. She passed a competition to enter in the Cours Florent. She is one of the 18 selected over 1,500 candidates. She begin training in September 2015. The 4 February 2016, she is invited to pay tribute to Les Rita Mitsouko alongside other artists like Congopunq, Olivia Ruiz, Matthieu Chedid, Adrienne Pauly, Izïa, Sabina Sciubba, Moodoïd, Nosfell. She sing "Ding Ding Dong (Ringing At Your Bell)" & "Andy". The concert is to the Théâtre du Rond-Point. The 17 February 2016, she is invited to the 20th birthday of Mathieu Boogaerts's career. She sing Polka with him. The concert is broadcast on Arte The same day, an acoustic version of her song "Dans ma maman" with Boogaerts is posted by "Bruxelles Ma Belle" on YouTube. The 26 February 2016, she made a cover of "Le mambo du décalco" by Richard Gotainer with her friend Jerome Laperruque. The 2 April 2016, she is headline of the "Festival Lyrics" in Lys-lez-Lannoy. A choir sing in the first part of her concert, Luce's first album's songs. During the Cours Florent, she play in "Peer Gynt" by Henrik Ibsen, "Fragments" by Jean-Luc Lagarce, "Alone in Berlin" by Hans Fallada and "Les Montagnes Russes" by Igor Mendjisky.