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 19Atlantic City, NJAtlantic City Boardwalk Hall
February 21 – 22New York, NYMadison Square Garden Arena
February 24Washington, DCVerizon Center
February 26Pittsburgh, PAConsol Energy Center
March 3Toronto, ONAir Canada Centre
March 8Boston, MATD Garden
March 10Columbus, OHSchottenstein Center
March 14Dallas, TXAmerican Airlines Center
March 15San Antonio, TXAT&T Center
March 19Salt Lake City, UTEnergySolutions Arena
March 25Las Vegas, NVMGM Grand Garden Arena
March 28Los Angeles, CAStaples Center
April 8Houston, TXToyota Center
April 9New Orleans, LANew Orleans Arena
April 12Sunrise, FLBankAtlantic Center
April 13Miami, FLAmericanAirlines Arena
April 18Duluth, GAThe Arena at Gwinnett Center