Free Concert: Katy Perry, Roseland Ballroom, 11/8

c/o Billboard.com:

Microsoft and AT&T will launch the new Windows Phone with free concerts featuring Katy Perry at the Roseland Ballroom in New York, and Maroon 5 at the Fillmore in San Francisco on Nov. 8, the company announces today. Tickets are available only at select AT&T stores in San Francisco and New York on the day of the shows, also the day the Windows Phone launches.

You must pick up your free ticket at a participating AT&T Store.

In New York they are:

• 209 West 34th Street
• 381 Madison Avenue
• 82 Wall Street

• 3 Times Square
• 31 East 17th Street (Union Square)
• 745 Broadway
• 773 Lexington Avenue

One ticket per customer. The tickets are admit two.

Even with a ticket, admission is not guaranteed. First-come first-serve.

You can only pick up the tickets on the day of the show (Nov 8).