Country star Carrie Underwood will headline an outdoor show July 21 at Treasure Island Casino Amphitheater.

Tickets are priced from $129 to $59 and go on sale at 10 a.m. Friday through Ticketmaster.

In the 18 years since she won the fourth season of “American Idol,” Underwood has found remarkable success, winning eight Grammy Awards and hitting No. 1 on the Billboard country singles charts a record 16 times.

Her current tour began last year and is running concurrently with her well-received Las Vegas residency. They both support her ninth album, “Denim and Rhinestones,” which features the singles “Ghost Story” and “Hate My Heart.” Other recent hits from Underwood include “If I Didn’t Love You” (with Jason Aldean), “Southbound,” “Love Wins,” “Cry Pretty,” “Dirty Laundry,” “Church Bells” and “Heartbeat.”

In October, Underwood filled Target Center for a concert that included her enthusiastic take on Guns N’ Roses’ “Welcome to the Jungle.” Last April, she invited Axl Rose to join her onstage at the Stagecoach festival for a pair of GNR classics and called it “the greatest night of my life.” Monday night, Rose joined her once more during Underwood’s concert in Los Angeles.

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