Marx collaborated with Mervyn Warren on a song called "You Have More Friends Than You Know" for the It Gets Better organization. The song was featured on the television program "Glee" on April 18, 2013. Marx recorded his version of the song and made it available for download with a portion of the proceeds going to support The Trevor Project. Marx has also made a karaoke version of the song available for those who want to perform their own version and help spread the song's message, and has featured other versions on the song's website.