Conversation so far:
Why did those 3 depart the group?
In mid-2012, The Wiggles announced that Page, Fatt, and Cook would be retiring from touring with the group.
Did they have specific reasons for leaving the group?
because he found it too difficult to give up and because he still had a passion for educating children.
who left first?
Fatt and Cook had been talking about quitting touring for many years; Cook announced his intention to retire first.

Question: when is the last time they ll performed together?
Self-contained rewrite: when is the last time the Wiggles performed together?