IU kicks off new musical era with 'Unknown Planet'

IU has given fans a glimpse of what's ahead for her long-awaited sixth studio album with two brand-new songs. The singer-songwriter dropped "Unknown Planet" on September 10, a digital single containing the tracks “Unknown Planet” and “Dear My Crazy Soulmate.” IU is credited as the writer of both songs, which are set to be part of her upcoming sixth full-length album. The new release arrives exactly one year after her previous single, “Bye, Summer,” which also came out on September 10, 2025. While details about the upcoming album remain under wraps, IU has already begun introducing its world through a series of intriguing