In December 2003, she was invited to perform at 2003 Japan and ASEAN Pop Stars Dream Concert 2003 (J-ASEAN Pops 2003), held in Yokohama, Japan, alongside top Japan and ASEAN artists, including THE BOOM, You Hitoto, INSPi, Leonard Eto, Yuri Chika, Hiroshi Takano and Hideki Kurosawa from Japan. While ASEAN artists including Hans Anwar & Lo'Ryder (Brunei), Preap Sowat (Cambodia), AB Three (Indonesia), Alexandra (Laos), Lay Phyu & Iron Cross (Myanmar), Jolina Magdangal (Philippines), Tanya Chua (Singapore), Briohny (Thailand) and Lam Truong (Vietnam). For the concert, a special song was composed by a Japanese composer, Kazufumi Miyazawa with lyrics by a Singaporean lyricist, Dick Lee entitled, "Treasure the World". The same song was also sung by each singer from each participating country in their native languages, where Siti's version which was in Malay, entitled "Dunia Milik Kita" was also performed for the first time during the event.