Conversation so far:
When was Robin's death?
20 May 2012.
When did they return to performing?
Barry and Robin performed on the BBC's Strictly Come Dancing on 31 October 2009.
What happened in 2009?
appeared on ABC-TV's Dancing with the Stars on 17 November 2009.
What happened in 2010?
On 26 May 2010, the two made a surprise appearance on the ninth-season finale of American Idol.
What happened in 2011?
On 20 November 2011 it was announced that Robin Gibb, at 61 years old, had been diagnosed with liver cancer.
What happened in 2012?
Robin joined British military trio the Soldiers for the Coming Home charity concert at the London Palladium, in support of injured servicemen.
What aspect did you find interesting about the article?
With Robin's death, Barry became the last surviving Gibb brother, and the Bee Gees dissolved as a musical group.

Question: When was the last time they performed?
Self-contained rewrite: When was the last time Bee Gees performed?