The 'Blank Space' singer was pictured rocking out backstage at KIIS FM's Wango Tango in California on Saturday while DJ Calvin was doing his thing on stage.
She sure looks happy, right?!
Taylor and Calvin first fuelled rumours they were dating back in April, when they were pictured holding hands after leaving a club in Hollywood. They were also seen together at a country concert looking very close and cuddly.
Although Taylor is known for having a string of famous ex-boyfriends, she recently said she doesn't want her love life to be in the spotlight. She told Glamour magazine she felt she'd been "publicly humiliated" over past failed romances and it had made her wary of dating in the limelight again.
There is no easy way for me to engage with romance. I'm really busy, so I can't. And it's a good thing that I feel really independent and I feel that my friends are all I need.
"It's kind of a sad way I got there though, being shamed into it. What else is it when you have two boyfriends in one year and everyone's calling you boy crazy, making jokes about you at awards shows? That's public humiliation. And I don't think it's fair."