U2 look over their shoulders for modern bands, it has been revealed.

U2 have admitted they are scared of contemporary music acts such as Coldplay and The Killers.
Speaking to BBC Radio 1's Newbeat, U2 frontman Bono revealed the band consider themselves to be "up against" the relative newcomers.
He commented: "Coldplay are such an extraordinary band with such song-writing talents. I think [Chris Martin] is one of the most important melodists since Noel Gallagher, since Ray Davies, since Paul McCartney."
The singer also told the broadcaster that he likes how The Killers are working hard to get their songs played on the radio.
U2 guitarist The Edge added that he believes Kings Of Leon are a band to watch for the future, saying that it was good to work with them when they supported the recent Vertigo world tour.
The 12th studio album from U2 - No Line On The Horizon - is set to be released on March 2nd.
Last month, the group revealed that the record has been produced by big hitters Brian Eno, Danny Lanois and Steve Lillywhite, with work taking place in studios in Morocco, Dublin, London and New York.
News brought to you by Tourdates.co.uk bringing the latest in Free Music Downloads.