Though the snow is still on the ground in some areas, many of this summer's biggest tours are already mapped out. Tickets to several stops on Jimmy Buffett [ tickets ]'s spring-summer outing will be among this weekend's new offerings.

At 10 a.m. Eastern Time on Saturday (3/24), on-sales are set to begin for Jimmy Buffett's appearances in Cincinnati; Pittsburgh; Bristow, Va.; and Indianapolis.

Tickets for Buffett's Chicago appearance will go on sale at 10 a.m. Central Time on Saturday, and fans in the San Diego area will get their first shot at tickets at noon. At 10 a.m. Mountain Time, tickets go on sale in Phoenix.

At 10 a.m. on Monday (3/26), tickets for Buffett's Irvine, Calif., show will go on sale.

Solid ticket demand has led to additional Dave Matthews Band [ tickets ] appearances in East Rutherford and Camden, N.J. Tickets for Matthews' June 13 show at Giants Stadium will go on sale at 9 a.m. Eastern Time on Saturday (3/24), and tickets for a June 24 show at the E-Center will go on sale at 10 a.m. Eastern Time.

On-sales will get underway for least nine upcoming Backstreet Boys [ tickets ] concerts on Saturday (3/24). A 7 a.m. Eastern Time on-sale is planned for the tour's Toronto stop; tickets to the show will be sold through Ticketmaster Canada.

For the group's Albany, N.Y., and Montreal concerts, tickets will go on sale at 9 a.m. Eastern Time. (Montreal tickets will be sold through the Admission Network.)

Tickets go on sale at 9:30 a.m. for Backstreet Boys' Boston; Calgary, Alta.; Edmonton, Alta.; and Vancouver, B.C., shows. (Tickets to the Canadian shows will be sold through Ticketmaster Canada.

At 10 a.m. Eastern Time, tickets go on sale for tour stops in Hartford, Conn., and Camden N.J.

'NSync's upcoming Detroit-area performance has been moved from the Pontiac Silverdome to Comerica Park, and has been pushed back a day to June 30. Tickets go on sale on Saturday (3/24) at 10 a.m. Eastern Time.

Tickets for 'NSync performances in Las Vegas and Oakland will go on sale at 10 a.m. Tickets.com will handle ticketing for both shows.

Look for Eric Clapton [ tickets ] tickets to go on sale in at least four more markets on Saturday (3/24). On-sale times of 10 a.m. Eastern have been set for upcoming Ohio shows in Cleveland and Columbus, and tickets for an Albany, N.Y., tour stop will go on sale at noon Eastern Time.

At 10 a.m. Central Time, tickets are scheduled to go on sale for Clapton's New Orleans concert.

Ticket on-sale information for many other shows is available at liveDaily's Ticket Alert.

Unless otherwise noted, tickets are available from Ticketmaster and Ticketmaster Online, as well as the venue box office. Ticketmaster is liveDaily's parent company.