Are Taylor Swift & Kendrick Lamar Remixing "Bad Blood"? They're Definitely Up To Something — PHOTOS

It's time for a rapid-fire Taylor Swift rumor roundup: Is Taylor Swift's next single "Bad Blood"? Maybe. Is Taylor Swift's next single a remix of "Bad Blood"? It's possible. Is Taylor Swift's next single a remix of "Bad Blood" featuring Kendrick Lamar ?? I can't say for certain — but the two artists are definitely up to something! On Monday, E! Online reported that Kendrick Lamar was seen on the set of the "Bad Blood" music video. Hmm... suspicious, indeed. But wait, there's more: According to People, Cara Delevingne, Zendaya, and Hayley Williams from Paramore were all there, as well. Great Scott! What in the world is going on here?

It's no secret that Swift and Lamar dig each other's music, so it seems plausible to me that they may have teamed up for a "Bad Blood" remix (which would explain Lamar's presence on set)... but what about Delevingne, Zendaya, and Williams? Are they all featured on the (rumored) remix, too? Or are they just appearing in the visual? Your guess is as good as mine, really. "Bad Blood" is about a friendship gone sour, so perhaps Swift just wanted to surround herself with pals she trusts for the music video? We'll have to wait and see.

Check out the "Bad Blood" set pics below.

Taylor Swift

Oooh, I like her hair.

Kendrick Lamar

Socks with sandals was a... choice.

Cara Delevingne

Brow game on point, as usual.

Zendaya

I have to admit, the white robes they were all wearing are weirding me out a little bit.

Hayley Williams

Her look is giving me major The Fifth Element vibes.

Stay tuned for more details.