Fifth Harmony celebrate career milestone: 'You guys seriously never fail us!'

'Sledgehammer' beauties Fifth Harmony are celebrating yet another impressive career milestone.

The band's latest single 'Worth It' has been certified Platinum, which means that it has sold 1 million units, and the girls took to their individual Twitter pages earlier today to announce the news.

Normani Kordei wrote: "'WORTH IT' WENT PLATINUM you seriously never fail us. You guys are so powerful please remember that and thank you for everything! I love you." Songstress Camila Cabello added: "'WORTH IT' WENT PLATINUM?!!!!! That is insane. THE P WORD. I can't believe that many of you are diggin' it. So crazy, thank you so much."

Hitmaker Lauren Jauregui also tweeted about the news and told her followers that she's overwhelmed and so proud: "It's 1 in the morning over here but it's definitely WORTH tweeting that WORTH IT went F**KIN' PLATINUM. You guys are amazing, I love you so."

Watch the girls performing the song at London's G-A-Y below: