Katy Perry, Chloë Grace Moretz, and More React to Taylor Swift's Feud With Kim Kardashian

Selena and Taylor have been BFFs for years now, so it comes as no surprise that the "Hands to Myself" singer came out swinging in favor of Taylor on Twitter.

Although it wasn't nearly as telling as the sassy Hillary Clinton GIF she tweeted out after Calvin's Twitter rant about his ex earlier in the week, Katy vaguely hinted at Taylor and Kim's drama with a clever plug of her new song, "Rise."

Zendaya makes an appearance in Taylor's video for "Bad Blood," but it seems their friendship has fizzled. The Shade Room noted that the K.C. Undercover actress "liked" (and then un-"liked") tweets from fans about how happy they are Zendaya appears to no longer be associated with Taylor.

Chloë pleaded with her Twitter followers and members of the music industry to stop wasting their voices on "petulant and unimportant" issues.

Khloé has never been shy about speaking her mind and made sure to back her sister up on Twitter after the episode of Keeping Up With the Kardashians aired, which also earned a nod of approval from Kourtney Kardashian, who tweeted, "If I ever need a hype man I know @khloekardashian has my back." Khloé also went after Chloë Grace Moretz — who has a tumultuous history with Kim — on Twitter, posting a graphic photo after the Neighbors 2 actress spoke out about the drama. "Is this the a hole you're referring to @ChloeGMoretz ???" she wrote, accompanied by a revealing image of a girl in a bikini. After she came under fire for the tweet, she said she's "the last person to bully" and was only trying to protect and defend her family.

Taylor's squad member Ruby Rose was quick to come to Chloë's aid on Twitter with a tweet of her own, which criticized Khloé. She followed that up with some thoughtful views about how the internet can be a "sad place."

When Joe Jonas famously dumped Taylor in 2008, it was rumored that the Jonas Brothers frontman had left her for actress Camilla Belle. Taylor channeled her anger into song when she lashed out at Joe and Camilla with her 2010 hit "Better Than Revenge." The tune features lyrics like "She's not a saint / and she's not what you think," and "She's an actress, whoa / She's better known for the things that she does /On the mattress." In an Instagram post on Monday, Camilla slyly referenced the incident with a post that starts off "no need for revenge."

The Victoria's Secret model (and member of Taylor's squad) echoed Selena's sentiment that there are "real problems" going on that people should be paying attention to, instead.

Demi didn't make a statement about the situation directly, but instead "liked" a tweet praising Kim on Twitter.

The "Sorry" singer hasn't always gotten on well with Taylor thanks to his on-again, off-again relationship with Selena, but his latest Instagram video makes it seem like he's taking a neutral stance. "Less hate, more love," he told the camera.