Country-music duo Sugarland [ tickets ] will hit the road this spring and summer for a 55-city trek that the pair has dubbed the "Incredible Machine Tour."

Although specific dates and venues for most shows remain pending, the outing will kick off April 23 in Primm, NV, and runs through late September. Currently confirmed dates are at right; updated information can be found at Sugarland's website.

"This new tour is a thrill for me," Nettles said in a press statement. "It will reflect our latest writing and surprises to come for the new record, the hits that our fans love, along with the production value that people have come to trust and expect from our live shows."

The duo is aiming for a "summer-ish" release date for their fourth studio album, according to an interview last fall with EW.com. "We've already been writing," Nettles told the website. "We have to go in the studio at the beginning of next year, at some point."

In the meantime, the two continue to support of a pair of recent efforts, including their platinum-selling third album, "Love on the Inside," which peaked at No. 1 on the Billboard 200 in 2008.

In October, the Sugarland released its first holiday album. "Gold and Green," which features five original compositions and five traditional holiday songs, including "Winter Wonderland" and "Silent Night," debuted at No. 12 on Billboard's Top Country Albums chart, eventually peaking at No. 3.