Carrie Underwood fans were excited today when they learned one of country music's most prolific and versatile power vocalists has just announced performances across North America as her new headline 2010 tour launches next spring. The "Play On Tour," hydrated by vitaminwater, will kick off March 11, 2010 with special guests Craig Morgan and Sons of Sylvia. The first leg of 45 shows runs through May 30 with tickets for all shows going on sale starting Friday, December 18. Underwood recently launched her third album, Play On, at the #1 spot on both the country and pop album sales charts and has sold over 700,000 copies in 5 weeks. The release earned the highest first-week sales of the year for any solo country artist at that point and makes Carrie the only country act in Nielsen SoundScan history to achieve first-week sales of more than 300,000 units on each of their first three albums. The feat also extends to American Idol, where the Season Four winner is the first contestant to launch three albums in a row above the 300K threshold, with her 2005 debut, Some Hearts, now seven-times Platinum, and 2007's Carnival Ride currently triple-Platinum.