Taylor Swift clearly never, ever wants Selena Gomez to get back together with her on-again-off-again ex-beau, Justin Bieber!
Backstage at Sunday night's Billboard Awards, Taylor and Selena were making their rounds arm-in-arm when they ran into Bieber.
The "Trouble" singer waited patiently for her Disney star/BFF to say hello to the Biebs ... but immediately got grossed out when she saw them share a quick kiss.
Check out Taylor's hilarious reaction above.
Best friends do have your best interest at heart, right? Plus we kind of agree with Taylor -- Selena can do better.
What do you think of Justin and Selena's relationship? Click here for more "WTF" moments from the Billboard Music Awards and check out all the red carpet shots in the gallery below!
