In 1999 Chisholm signed with Virgin and, during the summer, recorded the album Northern Star. She recorded "Ga Ga" from the Soundtrack of the film Big Daddy. The song was released as promotional single on 25 June, only in the UK. She also wrote and recorded the backing vocals for "(Hey You) Free Up Your Mind", sung by Emma Bunton from the film Soundtrack Pokémon: The First Movie. On 27 September, Chisholm released her debut single, "Goin' Down" and peaked at number 4 in the UK and 25 in Australia. The music video was shot in Los Angeles and directed by Giuseppi Capotondi. Her debut album, Northern Star, was released on 18 October 1999, peaked at number 4 and sold 4 million copies worldwide, received triple platinum in the UK, and another seven certifications, including platinum in Germany and Sweden. "Northern Star" was released as a second single and also peaked at number 4. To promote the album, Chisholm embarked on a tour called From Liverpool to Leicester Square, traveling to Australia, the US, Canada, Japan, the UK, Germany, Italy, Spain, France, Netherlands and Denmark, between 27 September and 1 November. In 2000, Chisholm had two songs in film soundtracks, "Suddenly Monday" in Maybe Baby and "Go!" in Whatever It Takes.