Lady Gaga continues to expand the scope of her North American tour, nearly doubling the length of the Monster Ball Tour’s early 2011 leg....

Lady Gaga continues to expand the scope of her North American tour, nearly doubling the length of the Monster Ball Tour’s early 2011 leg.

When it was announced in early May, the singer-songwriter’s early year itinerary held just eight dates. Now the 2011 jaunt has extended to nearly 20 concerts, beginning with a February 19 show at Boardwalk Hall in Atlantic City, NJ, and ending with an April 18 event at Gwinnett Center in Atlanta, GA.

New Monster Ball concerts, added late last week, include an extended February 21-22 run at Madison Square Garden in New York, NY, as well as shows on February 24 at Verizon Center in Washington, DC; March 14 at American Airlines Center in Dallas, TX; and March 28 at Staples Center in Los Angeles, CA.

Public ticket sales begin May 26 for Gaga’s newest concert dates in Washington, DC, Dallas and Los Angeles. Ticket prices for the two earlier dates range from $52.50 to $178, while prices in LA are set from $51.25 to $181.50, according to current listings on Ticketmaster.com.

Lady Gaga extended her Monster Ball Tour into the New Year due to the large number of sold-out concerts on her summer 2010 calendar. And the expansion isn’t complete yet, according to the artist’s official Web site, which notes that additional cities and venues will be announced in the near future.

Lady Gaga itinerary:
(Dates are subject to change.)

February 19 Atlantic City, NJ Atlantic City Boardwalk Hall
February 21 – 22 New York, NY Madison Square Garden Arena
February 24 Washington, DC Verizon Center
February 26 Pittsburgh, PA Consol Energy Center
March 3 Toronto, ON Air Canada Centre
March 8 Boston, MA TD Garden
March 10 Columbus, OH Schottenstein Center
March 14 Dallas, TX American Airlines Center
March 15 San Antonio, TX AT&T Center
March 19 Salt Lake City, UT EnergySolutions Arena
March 25 Las Vegas, NV MGM Grand Garden Arena
March 28 Los Angeles, CA Staples Center
April 8 Houston, TX Toyota Center
April 9 New Orleans, LA New Orleans Arena
April 12 Sunrise, FL BankAtlantic Center
April 13 Miami, FL AmericanAirlines Arena
April 18 Duluth, GA The Arena at Gwinnett Center