Fifth Harmony have performed a short vocal-only run through of their single 'Worth It'.

The girls were on the bill at this year's Capital FM Summertime Ball at London's Wembley Stadium on Saturday (June 6).

They treated fans in a pre-gig interview with the radio station to a section of 'Worth It' a cappella.

Singer Camila Cabello meanwhile said in the same interview that the day was one of the best of her life.

The group had been in the UK on promotional duties ahead of their Summertime Ball slot.

Their debut album 'Reflection' is due to be released in the country on June 29.

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Watch Fifth Harmony sing a cappella below: