One Direction May Be Sued by Def Leppard for Plagiarism
A comment from a "source" (according to the Daily Mirror) close to Def Leppard can be found below.
“Music lawyers will routinely scour hits like this one to see if there is any evidence that a band has either copied or cleverly mimicked a Def Leppard song. These cases can often take weeks to sort out because we are not talking about peanuts here – the 1D album is selling millions and if the title track goes out as a single it will generate even more money. Everyone is staying silent at this stage but it’s clear the two songs sound alike – which has been enough for Def Leppard’s aides to pose questions to their legal team.”