I don't get why it's a big deal whatsoever? Who actually cares? Taylor's always been a huge fan of rap, hip hop, etc. and she's always been very vocal about her support of the music and those artists. It's just so odd that people get so mad over...nothing. Life ain't that serious, people. It's a concert. And if you've ever been to one of Taylor's, you'd probably have the best time of your life.
She doesn't actually bop to these artist, she looked on iTunes and randomly picked who she's gonna bring out. She probably saw a vine one of her fans made that mashed Trap Queen and Bad Blood
Actually Nick Jonas, her close friend, said in an interview in the UK (Capital FM Istaoki if you want to check it for yourself) a month ago that Taylor is OBSESSED with Trap Queen and she bops to it ALL THE TIME. So this isn't random at all, she invites her friends + artists that have songs she likes.
Amusing to see the pressed so bothered by this. Taylor is always helping to promote other artists. This is just another example. Taylor has been having guest performers for 6 years now, it is hardly new. Fetty was happy to be there or he wouldn't have done it. How many times is he gonna be able to perform in front of 60k people? Pretty much every performer is gonna jump at that chance.
Plus even Billboard have been talking about how guests performing on this tour can get a bump in sales, profile and media headlines. Fetty is not the first and he won''t be the last. Taylor has 2 sold out stadiums at Levi's Stadium coming up next, and they will likely have guest performers too.
It's a huge platform for rising/new artists. She's inviting artists she likes and she's a fan of to perform with her. She's helping them out. Stop taking everything so seriously, damn. Y'all hate on her too much without really having a legit reason to.