Fifth Harmony have become the first girl group to reach one billion views for a single video on YouTube.

The band - who first found fame on 'X Factor USA' - reached the milestone for 'Worth It', which was uploaded to the video-sharing site in March 2015.

'Work From Home', released this year, is on track to match it as it currently sits at over 750 million views and the group - Ally Brooke, Normani Kordei, Dinah Jane, Camila Cabello and Lauren Jauregui - are hugely proud of the material on new album '7/27'.

Speaking about 'Work From Home', Ally previously said: ''When you first hear it - when we first heard it - we definitely were, like, connected to the beat and the melody and the music.

''And I think that's something that everybody can connect to. And I think it's something that's fun, that's flirty, it's not taken too seriously.''

Normani added: ''I think that just by listening to the album for the first time, you guys'll definitely be able to see the growth, just lyrically. I think that as women we've definitely found ourselves, because we've been through a lot this year, but also as musicians, and it really translates through the songs.''

Meanwhile, the girl group are thrilled they ''finally have a voice''.

Dinah shared previously: ''We finally have a damn voice. We feel like actual artists. We were little babies in the beginning. Now we're becoming big girls.''