Question: Which American singer-sonwriter is known for the album supporting tour The 1989 World Tour and the charity single Ronan released in 2012 ?

Dance Again World Tour was the first worldwide concert tour by American entertainer Jennifer Lopez.  Throughout majority her music career, beginning in 1999, a world tour by Lopez was anticipated, though it never materialized.  Following the release of her seventh studio album "Love? " (2011), she was more intent on touring than ever.  However, it was not until March 2012 when the tour came into the works.  As rumors began to circulate, Lopez later confirmed that April that she would be embarking on her first ever world tour.  She was joined by Spanish recording artist Enrique Iglesias for the North American leg of the tour, which was presented by State Farm Insurance and promoted by AEG Live.  The Dance Again World Tour also visited Australia, Asia, South America and Europe.  It commenced on June 14, 2012 in Panama, and concluded on December 22, 2012 in Puerto Rico. <SEP>  Swift's lyrics are based on a blog she read about a four-year-old boy, Ronan Thompson, who died from neuroblastoma in 2011.  Swift wrote the song by putting together quotes from blog creator Maya Thompson, Ronan's mother.  Thompson is credited as a co-writer of the song.  Swift first performed the song live for Stand Up to Cancer in September 2012, and has only performed it publicly one other time, at the Glendale, Arizona stop of The 1989 World Tour, at which Thompson was in attendance.  All proceeds from sales of the single go to help fight cancer. "Ronan" is a charity single released on September 8, 2012, by American singer Taylor Swift to the iTunes Store. <SEP> The 1989 World Tour was the fourth concert tour by American singer-songwriter Taylor Swift, in support of her fifth studio album, "1989" (2014).  The tour's European and North American dates, as well as two shows in Japan, were announced in November 2014, followed by the Oceania dates in December 2014.  Additional dates for Singapore and Shanghai were announced in June 2015 with a third and final Melbourne show announced in July 2015.  The tour began on May 5, 2015, in Tokyo, Japan and concluded on December 12, 2015 in Melbourne, Australia, the day before her 26th birthday.  The tour became Swift's highest grossing and most attended tour to date, mobilizing 2,278,647 fans and $250,733,097 revenue.  It was the highest grossing tour in the world in 2015. <SEP> Rock or Bust is a studio album by Australian hard rock band AC/DC.  It is their fifteenth internationally released studio album and the sixteenth to be released in Australia.  It is the shortest studio album ever released by the band; at approximately 35 minutes, it is two minutes shorter than their previous shortest album, "Flick of the Switch", which was released in 1983.  "Rock or Bust" also was the group's first album without founding member and rhythm guitarist Malcolm Young, who had retired from the band in 2014 due to health concerns, although he co-wrote every track on the album.  Bass guitarist Cliff Williams has also retired since "Rock or Bust" was released, drummer Phil Rudd was unable to participate in the supporting tour after being sentenced to house arrest, and vocalist Brian Johnson was forced to exit the band after the fifth leg of the album's supporting tour as a result of hearing loss.