Halsey has released a new single titled 'Lonely Is the Muse,' showcasing a darker rock sound that contrasts with her previous pop track 'Lucky.' The lyrics explore themes of personal struggle, worth, and the impact of fame, with Halsey reflecting on feeling used despite her success. The song, co-written with Stuart Price, features poignant lines about her past relationships and the loneliness that comes with her career. Halsey teased the track at festivals in Budapest and Helsinki, emphasizing her desire to blend pop and rock in her music. This single is part of her upcoming fifth studio album, which is expected to be released later this year. Halsey has also opened up about her health challenges, which have influenced her music during this era.