What is colbie calliats new song?

As of my limited knowledge up to January 2022, Colbie Caillat's latest release is the single "I Do," a collaboration with fellow American singer-songwriter Jason Mraz. The song was released on October 23, 2020.

However, it's possible that Colbie Caillat may have released new music after January 2022. I recommend checking official sources, such as her website, social media, or music streaming platforms, for the most up-to-date information on her music releases.