A Taylor Swift Super Bowl halftime show is gaining steam. In the days since the pop star joined boyfriend Travis Kelce’s “New Heights” podcast, the rumor mill has churned about a potential on-stage appearance at Levi’s Stadium during the Big Game. And prediction markets have followed.

Taylor Swift has traveled all over the world on tour, setting numerous stadium attendance records throughout her career. But there's still one highly coveted gig she hasn't yet played: the Super Bowl.