Rebel Wilson declared 2020 to be her "Year of Health," and clearly, all of her hard work is paying off!While working on the movie last December, the 40-year-old actress told ET that she «lost eight pounds in four days» from all the moving around and dancing involved in shooting her number.«One, because there's a lot of physicality, but also, [to prevent injury] they heated up the set very high, to almost 100 Fahrenheit, so that we could never cool down,» she explained at the time. «They'd heat up the set like a sauna so we would never cool down, but it made it pretty uncomfortable.»Ever since, Wilson has been committed to improving her health and fitness routine, and has taken fans along with her on the journey.