Task: Explanation
Input (English): The videography of Elton John consists of 118 music videos and 17 video albums. Since 1970, John has continually released promotional music videos, beginning with "Your Song" and only sporadically releasing videos thereafter. It was not until "Visions" in 1981, a release that included music videos of every song from his album "The Fox", as well as the rise of MTV, that he began to release videos more frequently. He had usually appeared in his music videos, but after 2001, John began appearing less and less in his own videos, sometimes opting to have other actors, such famous names as Justin Timberlake and Robert Downey, Jr., lip-synch the lyrics. Question: Which American singer-songwriter lip-synched lyrics for Elton John? Answer: Justin Timberlake
Output (English):  He had usually appeared in his music videos, but after 2001, John began appearing less and less in his own videos, sometimes opting to have other actors, such famous names as Justin Timberlake and Robert Downey, Jr., lipsynch the lyrics.