By Niamh Spence Taylor Swift fans are hoping the musician will pop up to perform with Usher at his halftime show at this year’s Super Bowl. After Taylor performed a sold-out tour in Tokyo this weekend, she is expected to make an appearance at this year’s Super Bowl as her boyfriend Travis Kelce takes to the field for his team the Kansas City Chiefs. The singer took her private jet to make it back in time for the game, but now fans are busy discussing a new reason for her return as they wonder if she will join Usher on stage for his halftime performance. Usher and Taylor have shared a stage bef…