3-point contest Simone Biles trolls ex-teammate after gold medal win, Megan Thee Stallion puts on a show for Kamala Harris in Atlanta, Jonathan Majors is bummed over Robert Downey Jr’s Marvel villain casting, and Selena Gomez gives insight into her ‘it girl’ era when she dated Justin Bieber. FOLLOW ALL TMZ PODCASTS: https://www.audio.tmz.com/ About TMZ:…