On March 18, 2026, MAMAMOO’s Moonbyul dropped a buzzworthy Instagram update—her third single 'REV' is coming soon. She amped up excitement by unveiling a music sampler for fans. Moonbyul also revealed the 'REV' cover art, doubling down on the hype. The image features graphics that pulse with a hard-hitting beat and the line "Moon Byul 3rd Single." Fans reacted in droves, saying things like "The song sounds so good" and "Moonbyul’s versatility never disappoints."