May 23 (Reuters) - The U.S. Justice Department, along

with a group of 30 states and the District of Columbia, filed a

lawsuit to break up Live Nation on Thursday, arguing the

concert promoter and its Ticketmaster unit illegally inflated

concert ticket prices and hurt artists.

Politicians, concert fans and experts have called on U.S.

authorities to reconsider investigating the 2010 merger of Live

Nation Entertainment ( LYV ) and Ticketmaster following the

botched ticket sales of Taylor Swift's 2023 "Eras" concert tour.

Here is a timeline of events.