'Worth It' hitmakers Fifth Harmony have achieved an incredible feat on YouTube. 

The music video hosting site confirmed the incredible statistic late last night (June 13) and explained that 5H's videos have been watched "more times than there are people in the U.S." (see screenshot below).

The girls, meanwhile, are also set to take the stage on the popular 'Jimmy Kimmel Live' show on Thursday, June 18 and network ABC has listed the line-up for the programme as being actor Jack Black, Jeffrey Tambor, music from Fifth Harmony featuring Kid Ink. 

They broke the amazing news to their devoted fans, who are known as Harmonizers, on June 12, tweeting: "WE HEARD U HARMOS! Making our late night debut 6/18 performing #WorthIt w/@kid_ink on @JimmyKimmelLive #5HonKimmel"

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