Classic rock group Fleetwood Mac has significantly extended its North American tour by two months. Originally set for 15 concerts in the northeast, the outing is now booked for 44 shows from coast-to-coast.

A second night has been added to the band’s stay in Chicago, expanding the run to March 5-6 at the Allstate Arena. Breaking for a couple weeks after the March tour leg, Fleetwood Mac will then return to the road with an April 15 show at the Wachovia Center in Philadelphia, PA, and continue through a May 31 concert at San Diego Sports Arena in San Diego, CA.

Highlights for the expanded itinerary include an April 22 show at the St. Pete Times Forum in Tampa, FL, a May 2 gig at Toyota Center in Houston, TX, a May 10 set at Pepsi Center in Denver, CO, a May 18 concert at Arco Arena in Sacramento, CA, and a May 30 performance at the MGM Grand Garden Arena in Las Vegas, NV.

Live Nation is producing the North American tour and handling ticketing via the company’s new ticketing operation, Live Nation Ticketing. Ticket pre-sales for the recently added shows begin on January 17 with public onsales following on January 26 at 10 a.m.

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Fleetwood Mac announced initial plans for the Unleashed greatest hits tour in early December. It will be the quartet’s first tour in five years with principal members John McVie, Stevie Nicks, Mick Fleetwood and Lindsey Buckingham all appearing.

“We love our band and think the title of the tour ‘Unleashed’ perfectly describes how we all feel when we get on stage together — especially in 2009,” the band members said in a joint statement on their Web site. “We’re so happy to get back out on the road, perform everyone’s favorite songs and see our fans.”

Fleetwood Mac itinerary:
(Dates are subject to change.)

March 1 Pittsburgh, PA Mellon Arena
March 3 St. Paul, MN Xcel Energy Center
March 5 – 6 Chicago, IL Allstate Arena
March 8 Detroit, MI Palace of Auburn Hills
March 10 Washington, DC Verizon Center
March 11 Boston, MA TD Banknorth Arena
March 13 Uniondale, NY Nassau Coliseum
March 14 Uncasville, CT Mohegan Sun Arena
March 16 Rochester, NY Blue Cross Arena
March 17 Albany, NY Times Union Center
March 19 New York, NY Madison Square Garden
March 21 East Rutherford, NJ Izod Center
March 24 Ottawa, ON Scotiabank Place
March 25 Montreal, QC Bell Centre
March 26 Toronto, ON Air Canada Centre
April 15 Philadelphia, PA The Wachovia Center
April 17 Cleveland, OH Quicken Loans Arena
April 18 Columbus, OH Nationwide Arena
April 20 Orlando, FL Amway Arena
April 22 Tampa, FL St. Pete Times Forum
April 23 Sunrise, FL BankAtlantic Center
April 25 Charlotte, NC Time Warner Cable Arena
April 26 Greensboro, NC Greensboro Coliseum
April 28 Atlanta, GA Philips Arena
April 30 Dallas, TX American Airlines Center
May 2 Houston, TX Toyota Center
May 3 Tulsa, OK BOK Center
May 5 St. Louis, MO Scottrade Center
May 7 Omaha, NE Qwest Center Omaha
May 8 Kansas City, MO Sprint Center
May 10 Denver, CO Pepsi Center
May 12 Calgary, AB Pengrowth Saddledome
May 13 Edmonton, AB Rexall Place
May 15 Vancouver, BC General Motors Place
May 16 Tacoma, WA Tacoma Dome
May 18 Sacramento, CA Arco Arena
May 20 Oakland, CA Oracle Arena
May 21 San Jose, CA HP Pavilion @ San Jose
May 23 Anaheim, CA Honda Center
May 24 Glendale, AZ Arena
May 28 Los Angeles, CA Staples Center
May 30 Las Vegas, NV MGM Grand Garden Arena
May 31 San Diego, CA San Diego Sports Arena