Taylor Swift Rocks Out to Boyfriend Calvin Harris' Music at Wango Tango 2015

Taylor Swift enjoys live tunes amidst the smoke machines during her boyfriend Calvin Harris‘ set at 102.7 KIIS FM’s 2015 Wango Tango at StubHub Center on Saturday (May 9) in Los Angeles.

The 25-year-old entertainer was joined by her good pals Haim and was later seen drinking Diet Coke backstage.

“Thank you so much @BigSean for coming down to perform with me at the last minute tonight! What a guy #WangoTango,” Calvin tweeted.

In case you missed them, Taylor has been slowly releasing promo posters for her upcoming “Bad Blood” music video, including ones featuring Ellie Goulding, Zendaya, Gigi Hadid, Lily Aldridge, and Hayley Williams!