Taylor Swift stirred quite a controversy after she attended Drake's 30th birthday bash in the Los Angeles hotspot, Delilah. According to reports, the pop princess was spotted getting cosy with the birthday boy himself, which soon led to rumours linking her with the Hotline Bling rapper. However, according to a latest report, Swift's ex-boyfriend Calvin Harris has no faith in the whirlwind romance speculations.

"Calvin, isn't surprised that Taylor, and Drake are friends and he is not jealous one bit," a source told Hollywood Life explaining about Harris' response to Swift and Drake's dating rumours. The source further added, "He doesn't believe the rumours that they are somehow romantically involved."

The news comes after the Blank Space hitmaker was reportedly caught flirting with Drake on his star-studded birthday party. "Drake was cozy with Taylor [Swift] all night long," a source told the gossip site earlier adding, "They were all up on each other — no kissing — but touching each and other and cheeking."

While both the singers are fresh off their previous relationships – Swift was with British actor Tom Hiddleston while Drake went public with on and off lover Rihanna – reports claimed that the two could even be preparing for music collaboration.

"Taylor and Drake have been talking about collaborating on a song together for quite some time now. The project was put on the back burner because of their hectic schedules, but now seems like the ideal time for the two to start working together."

Apparently, even Harris allegedly felt the same way about Drake and Swift working well professionally rather than as a couple. "He knows Taylor too well and he knows Drake, not as well, but they just wouldn't hit it off as couple. They would hit it off in the recording studio, but that's it," the source added.