Queen + Adam Lambert (sometimes referred to as Q+AL or QAL) is a collaboration between the active members of the British band Queen (Brian May and Roger Taylor) and American vocalist Adam Lambert. As with all other Queen performances since 1997, longstanding bassist John Deacon has declined to participate in the project due to his retirement. This is the first long-term collaboration of Queen since the Queen + Paul Rodgers project ended in 2009.The collaboration originated when May and Taylor appeared on American Idol in 2009 when Lambert was a contestant. They began performing occasionally in 2011, conducted a short European tour in 2012, and in 2014 announced a world tour, the Queen + Adam Lambert Tour 2014–2015 with dates in North America, Australia, New Zealand, Asia, Europe and South