EW's Best of 2015: The story behind Taylor Swift's 1989 tour guests
As she launched her massive (85 date!) 1989 World Tour, she brought out 101 surprise guests for her fans. Click here for more Best of 2015 coverage. Credit: Kevin Mazur/LP5/WireImage But we know the Grammy winner has a knack for making the impossible seem effortless. Heres how the squad assembled. Those asks were sometimes made months in advance, according to a source. In OMIs case, it was requested that he sing Cheerleader....