The much rumored world tour of Irish supergroup U2 is finally becoming a reality.

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U2 kicks off it's "Vertigo" tour March 28 at the San Diego Sports Arena, Billboard exclusively revealed Friday. Tickets go on sale Jan. 29.

The tour is named for the first single off the band's new album on Interscope, "How To Dismantle an Atomic Bomb," Billboard said.

Billboard said U2 could be the top-grossing tour of 2005 with a gross potential of $225-$250 million from as many as 110 shows.

The first two-month leg will wrap up in Boston in late May followed by about 30 European stadiums, beginning June 10 in Brussels. The band will return to North America in mid-August for another 30 arena dates.

Ticket prices are expected to average $90, including $49.50 on the low end and $165 on the high end.

The group is nominated for three Grammy awards, including best rock song and best short form music video for "Vertigo," and will perform during the Feb. 13 awards presentations in Los Angeles.