With a successful first leg of tour dates behind her, Britney Spears [ tickets ] will return to North America this summer for another round of "The Circus Starring Britney Spears." Currently in the midst of a European run, the pop superstar will kick off a second North American road trip in late August, and the 20-city outing will touch down in major markets throughout the US and parts of Canada.

Friday (6/19) on-sales are scheduled for Spears' upcoming performances in Hamilton, Ontario; New York City; Orlando, FL; Greensboro, NC; Auburn Hills, MI; Rosemont, IL; Dallas, TX; El Paso, TX; Los Angeles; and Las Vegas.

[Click to search for Britney Spears tickets at Ticketmaster.com.]

Legendary singer Tony Bennett [ tickets ] will spend much of the summer and fall on the tour trail, performing hits from his extensive discography before preparing for the holiday season with material from last fall's "A Swingin' Christmas."

Tickets for Bennett's upcoming engagements in Vancouver, British Columbia; Calgary, Alberta; Saskatoon, Saskatchewan; Winnipeg, Manitoba; and Edmonton, Alberta, all go on sale Friday (6/19).

[Click to search for Tony Bennett tickets at Ticketmaster.com.]

Tool [ tickets ] has nailed down the details for a brief summer tour as the prog-metal vets continue to support their most recent album, "10,000 Days," which surfaced in the spring of 2006, debuted at the top of The Billboard 200 and earned the group two Grammy nominations.

Tickets go on sale Friday (6/19) in Manchester, NH; and on Saturday (6/20) in Cincinnati, OH.

[Click to search for Tool tickets at Ticketmaster.com.]

After spending much of the spring supporting its latest studio album, Irish singing group Celtic Thunder [ tickets ] has unveiled plans for another round of US dates this fall. The all-male quintet will continue touring behind its sophomore set, "Celtic Thunder: Act Two," with a 21-city trek that gets underway Oct. 9 in Torrington, CT.

Friday (6/19) on-sales are set for the troupe's October visits to Brookeville, NY; and Peoria, IL. Tickets roll out next Monday (6/22) for a two-night stand in Seattle.

[Click to search for Celtic Thunder tickets at Ticketmaster.com.]

Dave Matthews Band [ tickets ] will once again spend the summer working the road as the group backs its recently released chart-topping album "Big Whiskey and the Groo Grux King."

Tickets will roll out Friday (6/19) for the group's two-night stand in Los Angeles.

[Click to search for Dave Matthews Band tickets at Ticketmaster.com.]

Ticket on-sale information for many other artists--including Kings of Leon, David Cook, James Taylor, Def Leppard, Poison and Tori Amos--is available at LiveDaily's Ticket Report.

Unless otherwise noted, tickets are available from Ticketmaster and Ticketmaster.com, as well as the venue box office. On-sale dates and/or times are subject to change. Ticketmaster is LiveDaily's parent company.