It may have been raining earlier in London today, but Camila Cabello brought a ray of sunshine as she turned up at London's Radio 1 Live Lounge with Machine Gun Kelly and performed a stunning cover version of James Arthur's hit, 'Say You Won't Let Go'.

The music stars are in the British capital currently to perform their hit collaboration, “Bad Things," and kicking off their European promotion.

It was the star's second time on the show, after first appearing last year with her former girl group Fifth Harmony, but her first time appearing as a solo artist. And after her moving performance today, Cabello looks destined to enjoy a whirlwind of even further success in the future.

Camila Cabello also released 'I Know What You Did Last Summer' with Shawn Mendes last year.

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Watch Camila Cabello and Machine Gun Kelly in action, below: