Cardi B goes \u201cUp\u201d on the Billboard charts, Olivia Rodrigo is ready to work with her idol Taylor Swift and Megan Thee Stallion drops a sassy 'Southside Forever Freestyle.' This is Billboard News Now, rounding out the top music news for Tuesday, February 16th.\xa0\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices