Swift just seems like something that wouldn't fit a fast-paced intense roller coaster. I'm no Swift fan (though my family sure is), but her music seems a bit to slow for that (YES, I'm sure she has more fast paced songs, but people go for the popular ones, and at least what I've randomly heard on the radio I'm not sure I see it, especially if you need like 4-5 songs). I still think the Muppets doing cover songs makes far and away the most sense. You can easily switch out songs without changing any of the preshow if you need to, and I'd guess it'd be hugely popular. Then, you can have like a Swift song, a more classic rock song, a newer rock song, etc. When a song or artist becomes less popular, the change is just getting a few voice actors doing a recording and grabbing new rights. Heck, I would DIE laughing if they start a song for the launch, go "No No No" and proceed to Rickroll random rides. Maybe 1 every 50 launches or something like that. Just feels that would give them WAY more creativity.