Conversation so far:
What happened in 2006?
Cole joined the Tour de Force series of concerts in Iraq and "across the Middle East" for Australian Defence Force "personnel.
What was Poster Girl?
".
In May 2006 she issued a single, "Poster Girl (Wrong Side of the World)" in response, she declared her support for the Australian diggers but not the Iraq War.
Was the single a success?
Single of the Year, and Song of the Year for "Poster Girl (Wrong Side of the World)".
What was Songbirds?
In 2007, Cole, Jeffreys and Storer combined to form Songbirds.
Did the band see any success?
A live concert film Songbirds: You've Got a Friend was recorded at the Tamworth Country Music Festival on 22 January 2009 and the related DVD was released in May.
Where was the DVD released?
CANNOTANSWER.

Question: What else was significant about the DVD?
Self-contained rewrite: What else was significant about the DVD other than being recorded at the Tamworth Country Music Festival?