During a concert in Rosemont, Illinois, Machine Gun Kelly surprised fans with a duet performance alongside Halsey on his hit song 'Bad Things.' MGK took the opportunity to publicly honor his friend's perseverance amid ongoing health challenges, including lupus and a T-cell disorder. The moment highlighted their long-standing friendship and Halsey's determination to continue performing.
Concert Performance
Machine Gun Kelly's show at the Allstate Arena in Rosemont, Illinois, on Thursday evening turned into a heartfelt collaboration when Halsey joined him onstage for a rendition of 'Bad Things,' his 2016 Billboard Hot 100 track originally featuring Camila Cabello. Halsey handled Cabello's verses, delivering lines like 'Am I out of my head? Am I out of my mind? / If you only knew the bad things I like.' This surprise appearance marked one of the closing dates of MGK's 2025 Lost Americana tour.
Tribute to Halsey's Strength
Before the duet concluded, MGK paused to deliver an emotional tribute. 'I wanna give flowers to this amazing woman, who’s had a very, very, very tough couple of years,' he said, acknowledging her battles with serious illnesses. He highlighted her recent chemotherapy treatments, noting, 'This girl is still going through chemotherapy and fighting every day, and she’s out here crushing it.' Halsey, who revealed her diagnoses of lupus and a rare T-cell lymphoproliferative disorder in 2024—stemming from two years prior—had undergone another round of treatment before starting her Back to Badlands Tour in October 2025.
Shared History
The performers have maintained a close friendship for years, collaborating on 'Forget Me Too' from MGK's 2020 album Tickets to My Downfall. Halsey previously surprised fans by joining MGK during his 2022 Mainstream Sellout Tour in Los Angeles. Their onstage chemistry underscored mutual support, with MGK emphasizing Halsey's impact on music and their personal bond.