Benedict Arnold. Julius and Ethel Rosenberg. Paul the Verizon Guy.

History is full of turncoats and traitors, but perhaps none is more treacherous than the wolf in Victoria's Secret clothing known as Karlie Kloss.

You may know Karlie from her modeling career, or as the former best friend of one Ms. Taylor Alison Swift.

Having apparently forgotten that her former friend is rivaled only by Biggie and Tupac in her love for a scathing diss track, Karlie has openly betrayed her ex-bestie by grabbing sushi with none other than Katy Perry.

Unless this is the first time you've heard of either singer, then you're probably aware that Taylor and Katy are rivals.

Actually, that's an understatement.

Katy and Taylor despise one another for reasons that have never been entirely clear.

Taylor says it's because Katy stole her backup dancers.

But the consensus seems to be that it has more to do with the fact that both women dated John Mayer.

Whatever the case, the former friends are now bitter enemies, and that doesn't seem likely to change, especially now what Katy is plundering Taylor's famous squad for new allies.

According to TMZ, Katy and Karlie were spotted grabbing sushi in LA together on Wednesday night.

It's a pretty clear sign that Karlie has switched her allegiances, and Taylor fans are reading the flaunting of this new friendship as an intentional, public diss from Katy.

But to be fair, Karlie and Taylor have apparently had problems for quite some time.

They haven't been spotted hanging out since 2015, the bizarre period of time during which Taylor's squad seemed to make constant tabloid headlines.

It's been rumored that some of the more scathing lyrics in Taylor's blistering single "Look What You Made Me Do" were directed at Karlie.

In turn, Kloss took a shot at Taylor by captioning a recent tweet "swish swish," an apparent reference to Katy's diss track of the same name.

So the fact that Karlie has buddied up with Katy may not come as a total shock, but even so, we're guessing Taylor will have a tough time shaking this one off.