Jose Carreras and Placido Domingoare are to perform together on Sunday for the first time since the death of their Three Tenors tour mate Luciano Pavarotti last year.The opera singers will pay tribute to the late maestro at a special show held by the Italian tenor's widow Nicoletta Mantovani and Princess Haya Of Jordan in Petra, Jordan this weekend.Andrea Bocelli and rocker Sting are also due to play at the two-day event, which will mark what would have been his 73rd birthday on Sunday.But the event will reach a climax when Carreras and Domingo take to the stage to celebrate the life of Pavarotti, who they toured with for 18 years.Pavarotti died on 6 September 2007 after losing his battle with pancreatic cancer.