“Sei solo tu” is a song written by Cheope and Nek and recorded by Italian singers Nek and Laura Pausini for Nek’s seventh studio album, Le cose da difendere. The song was released on 10 May 2002 as the album’s lead single.
The Spanish version of the album, Las cosas que defenderé, also includes a Spanish-language version of the song, titled “Tan sólo tú” and released as a single in Spain, South America, and in the United States.
Nek also included a solo version of the song in his compilation albums The Best of Nek: L’anno zero and Greatest Hits 1992–2010: E da qui.
