"Stranger" is a song written by Hilary Duff, Kara DioGuardi, Vada Nobles, Derrick Harvin and Julius Diaz, and recorded for Duff's third studio album, Dignity (2007). It is the third single from the album in North America, and will be released in mid-2007 (see 2007 in music). Duff's official UK site reported that "Stranger" would be the second single from Dignity to be released there.