Taylor Swift Cheers on Calvin Harris at Wango Tango, Spotted Holding Hands

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Taylor Swift might be her man's biggest fan.

The 25-year-old pop star was spotted cheering on her rumored boyfriend Calvin Harris during his performance at 102.7 KIIS FM's Wango Tango on Saturday.

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Swift, who got gal pal Alana Haim (from the all-female girl group Haim) to come along, was the main attraction as all eyes were on the "Blank Space" singer's every move.

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Ellen K, a side host on KIIS-FM's On Air With Ryan Seacrest, shared in an Instagram video saying that she witnessed Swift and Harris holding hands while walking down a hallway at the StubHub Center. "They were really happy," she said.

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Swift's rumored romance with the 31-year-old musician comes just months after she told British Vogue that she wasn't interested in a relationship.

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"Dating or finding someone is the last thing on my mind, because I can't picture how it could work with the way my life is," she told the magazine's November 2014 issue. "I just don't see how it could work, so I don't think about it, and I kind of run from it when it presents itself."

What do you think of Swift and Harris hanging out: spring fling or the real thing?