In January 2017, Larsson released "So Good", featuring American rapper Ty Dolla Sign. The single served as the fifth single from her second album of the same name, which was released on 17 March 2017 as her first international album. The album features other collaborations with Wizkid and Clean Bandit titled "Sundown" and "Symphony" respectively. The latter track was released as a single on the same date and became Larsson's fifth number one single in her home country and first number one single in the United Kingdom. The album became her second number one album in Sweden and peaked in the top ten in Australia, Denmark, Finland, Netherlands, New Zealand, Norway and the United Kingdom. On 12 May 2017, Larsson released a music video for "Don't Let Me Be Yours" as the sixth single from "So Good", with "Only You" being released as the seventh single from the album on 11 August 2017. In September 2017, Larsson announced that she had started work on her third studio album, saying in an interview she had written two new songs with MNEK. On 11 December 2017, Larsson once again performed at the Nobel Peace Prize Concert, this time alongside American singer John Legend. In January 2018, Larsson was named to "Forbes" "30 Under 30 Europe" list in the entertainment category. In September 2018, Larsson announced the lead single from her third studio album, "Ruin My Life". She released the song and music video on 18 October 2018. The track was commercially successfully worldwide, being certified at least gold in the US and the UK, while reaching number on in the Netherlands. In 2019, Larsson released the follow-up singles "Don't Worry Bout Me", "Wow", and "All the Time" from her upcoming album. In January 2019, she was featured on the song "Holding Out for You" by Italian rapper, singer and songwriter Fedez. On 8 November 2019, Larsson's next single, "Invisible", taken from the 2019 movie "Klaus", the first original animated feature film released on Netflix, was released on the same day the film was released. In March 2020, Larsson was featured on Kygo's single, "Like It Is", alongside American rapper Tyga. The song has performed moderately well, becoming a top 5 in Sweden, New Zealand, and Norway. Larsson has grown increasingly vocal with her views on other artists and industry workers with whom she works and admires. While she has high praise for performers such as Beyoncé, she is equal in her opposing views of such artists like Dr. Luke and Chris Brown.