Taylor Swift invited Kenny Chesney, Ronnie Dunn, Tim McGraw and Paramore's Hayley Williams to sing with her at back-to-back, sold-out concerts at the Bridgestone Arena in Nashville this weekend.
On Friday (Sept. 16), Swift and Williams performed "That's What You Get," while Dunn and Swift later sang "Bleed Red" together. The following night, Chesney and Swift chose "Big Star" for a duet, and McGraw joined her on "Just to See You Smile." Soulful pop singer Andy Grammer, who is one of Swift's favorite artists, also appeared to sing his song, "Keep Your Head Up."
Keeping with the tradition of past dates, Swift also wrote lyrics that she admires on her arm. On Friday night she featured Lee Brice's "Love Like Crazy," and quoted Martina McBride's "This One's for the Girls" on Saturday night.
Swift hosted a VIP reception prior to each show, where she was presented with a plaque celebrating 5 million copies of her current album, Speak Now. On Saturday, tickets sales for the Speak Now world tour officially surpassed the 1 million mark.
The tour concludes on Nov. 22 with a two-night engagement in New York City. In early 2012, she'll relaunch the tour with dates in Australia and New Zealand. After the tour, she expects to start "overdrive recording and obsessing" for her next album, she told The Tennessean.
CMT Radio contributed to this report.