Maroulis released "Here I Come," on January 29, 2016, and "She's Just Rock'n'Roll" in March. On February 18, 2016, with other American Idol alums, Maroulis returned to the show for its fifteenth season to mentor contestants and participate in Duets Week, where he performed "Bohemian Rhapsody" with Shelbie Zora and performed "My Funny Valentine" with Jenn Blosil. At the season finale, Maroulis returned with other former Idol contestants to celebrate the end of the series finale, where he performed a rock medley with Chris Daughtry, Bo Bice, Caleb Johnson and James Durbin, and a country music medley with Bucky Covington, Scotty McCreery, Ace Young and others.