The single "Only One" showcases U-KISS's signature blend of pop and dance-pop, characteristic of their early career. Released in 2010, it solidified their presence in the K-pop scene.
- "Only One" was released on February 3, 2010, by G1 Creative.
- The single features a prominent dance-pop sound, reflecting the trends in the K-pop industry at the time.
- This release was part of U-KISS's efforts to expand their reach following their debut.
U-KISS is a South Korean boy band formed in 2008, known for their energetic dance-pop performances. By 2010, they had established a significant following in East Asia.
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