Taylor Swift might have already kicked off the "1989 World Tour" in Tokyo last week and will be doing back-to-back shows till the end of the year. However, it looks like she was able to squeeze in a little fun time to check out Wango Tango last night (May 9) -- or perhaps spend some time with her rumored boyfriend, Calvin Harris.

The "Bad Blood" songstress headed to the music fest in the StubHub Center in Los Angeles with her tour mates and gal pals Este and Alana Haim. Going for cute and casual, Taylor wore brown short shorts and a tribal printed long sleeve sweater while the sisters Haim rocked it out in their black leather moto jackets. The ladies were photographed dancing up a storm during Calvin's set. You can see the photos of Haim and Taylor below.

Kevin Winter, Getty Images
Kevin Winter, Getty Images
Kevin Winter, Getty Images

And when Calvin was done with his DJ set, he apparently joined Taylor and Haim in the crowd to see Justin Bieber's show. People reported that the two were holding hands and even danced with each other during Justin's performance of "Boyfriend." And the hand holding apparently didn't end there. Ellen K, who hosts On Air with Ryan Seacrest, posted a video on Instagram reporting that she also saw Calvin and Taylor holding hands while hanging out backstage.

"They were really happy," Ellen said in the clip, which you can see below.

Taylor and Calvin jumpstarted the rumor mill when the two were spotted getting cozy in Nashville two months ago. They were then seen holding hands at a Haim show in April. While the two are staying quiet regarding their relationship, it seems they're not doing the best job of keep it under wraps.

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