Sophie Monk became famous initially through her participation in the Australian reality TV series Popstars in 1999, where she responded to an advertisement for the show's first season. Her audition performance, which included a rendition of Marilyn Monroe's "Happy Birthday," showcased her background as a Monroe impersonator and helped her secure a spot in the girl group Bardot, which was formed from the show.

Following her success with Bardot, Monk launched a solo music career, releasing her debut single "Inside Outside" in 2002, which reached number five on the ARIA Singles Chart, and her debut album, Calendar Girl. Her growing popularity and media presence extended into acting, both in Australia and Hollywood, with roles in films like Date Movie and appearances on American television such as Entourage.

Her fame was further solidified through her ongoing presence on Australian television as a singer, actress, and personality, as well as her public appearances and hosting roles, making her a well-recognized figure in Australia and abroad.