b'Olivia Rodrigo dominates the charts in Australia while Dixie D\\u2019Amelio gives Megan Thee Stallion a run for her money. Plus, The Weeknd and Ariana Grande give their TV debut performance of "Save Your Tears" at the 2021 iHeartRadio Music Awards.\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'