Conversation so far:
What was the big reunion?
March 2012.
Why did they get back together?
the group were reuniting for a summer tour.
Where did they tour?
The reunion was later dismissed by all members due to the tension between Katona and Frost.
What was the tension about?
CANNOTANSWER.
Are there any other interesting aspects about this article?
However, on 18 October 2012, it was announced that the 1999 line-up of Atomic Kitten (McClarnon, Katona and Hamilton) would reunite for an ITV2 series, The Big Reunion.

Question: Did the show happen?
Self-contained rewrite: Did the Atomic Kitten show happen?