Music like Timeless

"Timeless" is Zhang Liyin's debut single, released on September 8, 2006 in South Korea. The song is a remake of Kelly Clarkson and Justin Guarini's duet, originally recorded in 2003; it has also been remade by Tina Arena and Kane Alexander in 2006. A Chinese version of the single was released in 2007 in Taiwan.

For her debut song "Timeless", Zhang released two music videos with a single storyline. The music videos feature Super Junior members Han Geng and Siwon, as well as Lee Yeonhee. The music videos featured a hostage situation, in which the thief (played by Siwon) holds Lee Yeonhee captive. As the police arrive on the scene, a police officer (Han Geng) attempts to negotiate with Siwon. Siwon shows the hostage and points the gun at her. Han Geng pulls out his gun upon seeing her. Another police officer attempts to kill Siwon, but misses, resulting in Siwon shooting Han Geng. As Siwon makes an escape, he pulls Yeonhee's necklace with him, but he puts it away, uninterested. The story then jumps to a year later, where Han Geng is taken off life support. He is listed as an organ donor. At the same time, Siwon suffers a heart attack. He is given Han Geng's heart and survives. Whilst recovering, Siwon experiences flashbacks of Han Geng and Yeonhee, revealing to the viewers that Han Geng was Yeonhee's boyfriend; however, this confuses Siwon. He recognizes a store from his flashbacks and approaches it, seeing Yeonhee inside. Yeonhee helps him to sit while he experiences some heart pains. While Siwon wonders whether they've met before, he notices a picture of Han Geng and Yeonhee. He then makes the realization that he killed Yeonhee's boyfriend. He then goes through hospital documents and sees that Han Geng donated his heart to him, causing Siwon to realize why he's been getting flashbacks. He goes through his stuff to find Yeonhee's locket, showing a picture of Han Geng and her, after which he breaks down. He then goes to return the necklace. The story ends with Siwon begging for forgiveness on his knees while Yeonhee cries, clutching the necklace.