LOS ANGELES --
U2 topped a list of the most successful concert tours, according to data released by the trade publication, Pollstar.So far, U2's latest tour has grossed $6.8 million, leaving other artists far behind.
Country star Kenny Chesney came in second with $1.94 million.
He's followed by Taylor Swift, singer Sade and Britney Spears.
The list ranks artists by average box office gross per city and includes the average ticket price for shows in North America.