Taylor Swift is celebrating Team USA’s top athletes at the 2024 Summer Olympics. During NBC’s primetime coverage of the Olympics on Saturday (Aug. 3), the 34-year-old pop superstar narrated a promotional video praising three medal-winning stars at this year’s games: gymnast Simone Biles, swimmer Katie Ledecky and sprinter Sha’Carri Richardson. “Never be afraid to show them who you are, especially …