Taylor Swift — the 19-year-old country-pop star who’s had more hits in the past two years than most artists have in a lifetime — will perform May 21 at Jobing.com Arena. Tickets, which are $20 to $49.50, go on sale at 10 a.m. Saturday.

Swift’s first headlining tour promises to be one of the Valley’s biggest music events of 2009. Her two albums, “Fearless” and “Taylor Swift,” were the No. 3 and No. 6 bestsellers of 2008, making her the year’s top-selling artist.

Her self-titled 2006 debut featured five Top 10 singles, including “Our Song,” “Picture to Burn” and “Should’ve Said No.” Released in November, “Fearless” already has produced two more, “Love Story” and “White Horse.”

“Fearless” has spent nine weeks at No. 1 on the Billboard 200. The last album to achieve the feat was Santana’s “Supernatural” in 1999-2000.

“American Idol” alum Kellie Pickler and Nashville foursome Gloriana will open for Swift on her 52-city tour, which kicks off April 23 in Evansville, Ind. According to Swift’s publicist, the shows will feature “multiple costume changes” and a stage with a “fairy-tale castle.”