This year, the undisputed Queen of Pop, Madonna, and her heir apparent, Lady Gaga, are both set to launch world tours, which are highly anticipated by ticket brokers and fans alike.

Fresh off her successful Super Bowl Halftime Show performance, where she performed hits including "Vogue," "Music," and "Give Me All Your Luvin',"Madonna has once again proven her appeal is still as strong as ever. With her new album "MDNA" set to be released this March, tickets to the Material Girl's 2012 world tour have already begun going on sale, with tickets for the North American leg going on sale today, February 14, 2012.

TicketNews has released its exclusive Events rankings for the week ending Sunday, October 3, and Lady Gaga has found her way to the top spot for the first time since mid-April, power scoring a 5.02. This ended the thirteen-week reign of Wicked as the ranking's number one event, with the hit Broadway musical slipping to number two (4.14) this week.

Other musical artists joining Lady Gaga in the top ten were Roger Waters (three, 2.82), Justin Bieber (four, 1.93) and Michael Buble (nine, 1.26).

Lady Gaga shows no sign of slowing when it comes to expanding her North American itinerary. Pop music's It girl has revealed another dozen concert dates for her 2011 Monster Ball Tour, bringing the total to 36 dates across the United States and Canada.

Lady Gaga's latest tour stops are scattered across the United States — from the East Coast to the West, and the deep South to the Midwest — as well as the eastern portion of Canada. This revision comes hot on the heels of the five concerts announced last week.

It's been a successful year of touring for Lady Gaga, whose ongoing Monster Ball Tour extravaganza has sold out arenas around the world. This week, the pop culture icon's plans to extend her headline tour — and vice-like grip on the live entertainment industry — into the New Year received an upgrade with the addition of five new U.S. concert dates.

The latest tour stops are set for February 28 at United Center in Chicago, IL; March 23 at Arco Arena in Sacramento, CA; March 31 at Honda Center in Anaheim, CA; April 6 at Frank Erwin Center in Austin, TX; and April 19 at Bridgestone Arena in Nashville, TN.

Tickets for upcoming concerts from Lady Gaga, as well as tickets for the upcoming tour of the Jonas Brothers and Demi Lovato, are on sale throughout the weekend ending May 22 as compiled by TicketNews.

Starting off the weekend onsales are tickets to the upcoming concerts from Lady Gaga. Showing no signs of slowing from her extremely successful 2009, Gaga’s continued popularity on the charts will translate into strong ticket sales for her current concert tour. Among the markets with tickets on sale this weekend are San Antonio, Salt Lake City, and New York City.