I want to know the answer to the following question:
On 20 May 2009 which Queen members performed We are the Champions on American Idol?
All the background I'm provided with is that "On 20 May 2009, May and Taylor performed "We Are the Champions" live on the season finale of American Idol with winner Kris Allen and runner-up Adam Lambert providing a vocal duet.". Is that enough to answer the question?
Answer: yes