Former Heisman Trophy winner Johnny Manziel supports Travis Kelce's off-field ventures, including the "New Heights" podcast which just featured Taylor Swift as a special guest.

The pop superstar became the first musician to achieve billionaire status mainly through songs and performances, earning $800 million from touring and royalties.

One instance that stood out, however, was Swift’s response to Jason Kelce when they were talking about the number 13. The ...