Complex sentence: The boyband's last concerts were held 22 and 23 June 2012 at Croke Park Stadium in Dublin, with the first 85,000 capacity concert sold out in record-breaking 5 minutes and the latter screened live in cinemas worldwide.
Split into simpler sentences: The boyband's final concerts were held on 22nd and 23rd June 2012 at Croke Park Stadium in Dublin. The first farewell concert, offering 85,000 tickets, sold out in a record-breaking 5 minutes and the latter screened live in cinemas worldwide.