One Direction just announced nine more dates for their upcoming 2013 summer tour in the United States.
 “We are really excited to be adding dates to our 2013 tour of North America. We’d like to thank all our incredible fans who have already bought tickets. We can’t wait until next year to start our World Tour!” band mate Zayn Malik shared.

 Tickets go on sale in May at LiveNation and Ticketmaster. Check out the dates below:

6/16 Louisville, KY KFC Yum! Center – on sale 5/4/12
6/25 Philadelphia, PA Wells Fargo Center – on sale 5/5/12
7/2 East Rutherford, NJ IZOD Center – on sale 5/5/12
7/5 Hershey, PA Hersheypark Stadium – on sale 5/5/12
7/14 Chicago, IL First Midwest Bank Amphitheatre – on sale 5/5/12
7/21 Houston, TX Toyota Center – on sale 5/5/12
7/22 Dallas, TX American Airlines Center – on sale 5/5/12
7/30 San Jose, CA HP Pavilion – on sale 5/5/12
8/3 Las Vegas, NV Mandalay Bay Events Center – on sale 5/12/12

  Source