Fifth Harmony star Camila Cabello reckons 2015 is already a "beautiful" year for the group.

The US girl band are scheduled to release their debut album 'Reflection' on February 3.

The quintet also recently confirmed a number of North America tour dates alongside a cover of Mark Ronson's 'Uptown Funk'.

Cabello took to Instagram today (January 12) to post an image of Fifth Harmony's single 'Sledgehammer' resting at No.18 on the US iTunes chart.

She added: "ERMAGERD IT KEEPS GOING UP. 2015, you are already unfolding so beautifully.

"THANKS LOVELY HUMANS."

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Watch Fifth Harmony talk about their upcoming tour below: