What singer made appearances during Keith Urban's Ripcord World Tour who also the winner of the  fourth season of "American Idol"?
Ripcord World Tour The Ripcord World Tour (stylized as the ripCORD World Tour) was the eleventh concert tour by Australian singer Keith Urban. The tour was in support of his tenth studio album "Ripcord" (2016). The tour began on 2 June 2016 in Bonner Springs, Kansas and concluded on 17 December 2016 with two shows in Brisbane, Australia. Brett Eldredge, Maren Morris and Dallas Smith were supporting acts for Urban in North America. The Oceania leg of the tour was co-headlined with American singer Carrie Underwood, with Buchanan as opening act.
Scotty McCreery Scott Cooke "Scotty" McCreery (born October 9, 1993) is an American country music singer. He won the tenth season of "American Idol" on May 25, 2011. His debut studio album, "Clear as Day", was released in October 2011 and was certified platinum in the United States. The album includes the top 20 country songs, "I Love You This Big" and "The Trouble with Girls". McCreery released a Christmas album, "Christmas with Scotty McCreery", in October 2012 and it has been certified gold. He released his third album, "See You Tonight," in October 2013. The first single from the album, also called "See You Tonight", became his first song to reach the top ten on "Billboard's "Country charts.