As with McEntire's 2004 tour, the upcoming outing--which was announced earlier this year with a tentative itinerary--will give a boost to Habitat for Humanity, an organization that builds homes and sells them on a no-profit basis with zero-interest mortgages to poor families. Whirlpool has again signed on to sponsor McEntire's tour, and will use its sponsorship to benefit the charity.

"This year, I hope more people will join us to help Habitat, not only at the concert stops, but through involvement with Habitat," McEntire said in a statement.

According to a press release, Whirlpool donates a refrigerator and a range to every Habitat home built in North America.

McEntire, Paisley and Clark have nearly 50 No. 1 country singles between them.

McEntire released her 28th album, "Room to Breathe," in 2003, and followed it in 2004 with her first tour in three years. She was one of country music's most reliable concert draws before she stopped touring to dedicate her efforts to "Reba," a sitcom that debuted on the WB television network four years ago. The show taped its fourth-season finale last month, according to McEntire's website.

Paisley, a five-time CMA winner, is supporting his double-platinum 2004 album, "Mud on the Tires," which is his third consecutive album to sell more than a million copies.

Clark, a Canadian artist who broke out with her 1995 set, "Better Things To Do," also has three platinum albums under her belt. Among her hits are "Easy on the Eyes," "When Boy Meets Girl," "I Wanna Do It All," "Poor Poor Pitiful Me" and "Girls Lie Too."

In other news, McEntire is scheduled to perform a May 30 benefit show at the Choctaw Casino & Resort Coliseum in Durant, OK. The concert will benefit Reba's Ranch House, which aids the families of critically ill patients hospitalized at Texoma Medical Center in Denison, TX.