By now established as a leading star in Britain and America, Melba made her first return visit to Australia in 1902–03 for a concert tour, also touring in New Zealand. The profits were unprecedented; she returned for four more tours during her career. In Britain, Melba campaigned on behalf of Puccini's "La bohème". She had first sung the part of Mimì in 1899, having studied it with the composer. She argued strongly for further productions of the work in the face of the distaste expressed by the Covent Garden management at this "new and plebeian opera". She was vindicated by the public enthusiasm for the piece, which was bolstered in 1902 when Enrico Caruso joined her in the first of many Covent Garden performances together. She sang Mimì for Oscar Hammerstein I at his opera house in New York, in 1907, giving the enterprise a needed boost. After her initial successes in Brussels and Paris in the 1880s, Melba sang infrequently on the European continent; only the English-speaking countries welcomed her wholeheartedly.