Question: when did tonight's going to be a good night come out
Answer: The song was released on June 23 , 2009 and debuted at number two on the Canadian and Billboard Hot 100 on the week of June 27 , 2009 , behind the group 's `` Boom Boom Pow '' , making the group one of 11 artists who have occupied the top two positions of the Billboard Hot 100 at the same time .