Question: What was Rihanna's second single from her 2006 album "A Girl Like Me," written by Ne-Yo?
Related documents: [0]  [DOC] A Girl like Me is the second studio album by Barbadian singer Rihanna. It was released on April 10, 2006 by Def Jam Recordings. For the production of the album, Rihanna worked with Evan Rogers, Carl Sturken, StarGate, J. R. Rotem and label-mate Ne-Yo, who wrote the album's second single. "A Girl like Me" is a pop, reggae and R&B album influenced by Rihanna's Caribbean roots. The album also incorporates elements of dancehall and rock, as well as ballads, which music critics were ambivalent towards. [END] 
[1]  [DOC] "Unfaithful" is a song by Barbadian singer Rihanna from her second studio album "A Girl like Me" (2006). It was written by Shaffer "Ne-Yo" Smith with the song's producers StarGate. The song was released by Def Jam Recordings on May 2, 2006, as the second single from the album. "Unfaithful" is a pop and R&B ballad and was inspired by the works of American rock band Evanescence. Originally titled "Murderer", the single speaks about a woman who regrets cheating on her partner. [END] 
Answer: 
Unfaithful
Unfaithful