Robert Downey Jr. has become quite successful in the recent years thanks to his acting career with Marvel Studios. Iron Man and Avengers series have been a huge success making him nearly $90 million. When Robert Downey Jr. heard about his favour singer performing in his area, he had to get tickets to see Sting. One thing he wasn’t prepared for was to go on stage and sing. His management team pulled some strings and managed to get him on stage with Sting and perform a duet. Robert Downey Jr wasn’t aware of this until moments before.