The last time Johnson was spotted wearing white was to her birthday party in Malibu earlier this month, which she attended with boyfriend Chris Martin, his ex-wife Gwyneth Paltrow and guests such as Miley Cyrus and Julia Roberts.
"Dakota arrived with Chris Martin and his son Moses," a source told E! News at the time, adding, "She seemed very close with Moses and was laughing and holding on to him."
"The party was held at a vacant parking lot in Malibu. It was a huge party with white balloon arches going across the sky," they continued. "They had a big stage for performers and an Airstream set up with a bar. They had the Van Leeuwen ice cream truck as well. The decor was very boho with feathered pampas grass arrangements surrounding the stage."