Conversation so far:
What was their first solo act?
In January 2004, Hamilton announced she wanted to take a hiatus from the group.
What did she need to take the hiatus?
devote more time to her young son.
Did she come back for an appearance?
reunited on Valentine's Day 2005 to release the charity single "Cradle 2005".

Question: Was Cradle a hit?
Self-contained rewrite: Was Cradle a hit for the Atomic Kitten?