Which American singer-sonwriter is known for the album supporting tour The 1989 World Tour and the charity single Ronan released in 2012 ?
Ronan (song): "Ronan" is a charity single released on September 8, 2012, by American singer Taylor Swift to the iTunes Store. The 1989 World Tour: The 1989 World Tour was the fourth concert tour by American singer-songwriter Taylor Swift, in support of her fifth studio album, "1989" (2014).
Taylor Swift