Fifth Harmony's Camila Cabello absolutely slayed her live performance of "Bad Things" on Jimmy Fallon's chat show this week and she showed her appreciation for the opportunity with a sweet message that she shared online. 

The star, who collaborated with Machine Gun Kelly on the track, posted the following tweet: "Thank you so much @FallonTonight for having us, I freaked out when I found out we were performing this here, thank you @JimmyFallon for always being so kind and welcoming."

She also paid tribute to her collaborator, adding: "Thank you @MachineGunKelly for being seriously the sweetest and the coolest person it was so amazing to perform w you and your super dope band." 

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Watch their stunning performance of "Bad Things" here: