Box office is big business
U2 last year grossed $152.2m (€141.6m) in box office receipts as more than 1.2m fans paid to see the band perform across the globe.
That is according to new figures from trade industry journal, Pollstar which show that Niall Horan's all-conquering One Direction narrowly beat U2 in the Pollstar 2015 World Tour rankings to grab third spot.
This followed Pollstar revealing that One Direction recorded gross receipts of $158.8m.
The two are both well behind global superstar, Taylor Swift and AC/DC who both played Ireland last year.
The figures show that Taylor Swift grabbed top spot after recording gross box office receipts of $250m while AC/DC enjoyed gross receipts of $180m.
Gross box office receipts are shared between the artist, promoter and venue.
The detailed Pollstar figures show that the average ticket price for U2 gigs was $118.34.
The average gross from each U2 gig was $6.92m - easily the most lucrative average gross out of any of the performers featuring in the top 20.
The band played 76 dates in 22 cities where 1.286 million fans paid to see U2 perform for the first time live since their 2011 360 tour. The average number of people to see U2 at their gigs was 58,473 last year.
The band's 360 tour grossed $231.9m in 2011. Tickets for the band's four gigs at the Three Arena sold out in minutes last September - the band donated €2m from the gigs to their Music Generation initiative in collaboration with the Ireland Funds.
Niall Horan and his One Direction band mates played to 1.72 million music fans.
The average gross from each One Direction gig totalled $4.07m.
The figures also show that Garth Brooks made a strong recovery from his 2014 Croke Park debacle.
Brooks's 2015 gigs generated $114m - Brooks is ranked 9th after 1.787m fans paid to see the American singer.
The rankings show that another Irish favourite, Ed Sheeran who packed out Croke Park last year, generated $117.3m in gross receipts.
Music veterans, The Rolling Stones generated $109.7m in box office receipts with Madonna grossing $88.4m and Paul McCartney grossing $77.7m.