Fifth Harmony tease surprise and explain the roles they play in the group

'Sledgehammer' beauties Fifth Harmony recently sat down for a chat with 4Music in the UK and opened up about the roles they all play in the group.

The hitmakers described each other in the interview and admitted that they all play different parts that work well when they're around each other: "Camila is really goofy and dorky, but there's this refined side to her where she likes to read and she's really intelligent. She's really cool and she's got good music taste too. Normani is very glam diva and sometimes she can be shy at first when you meet her, but on stage she comes alive and she's fierce and sassy."

"Dinah's very funny without trying, which is good. She always has her boombox playing really loud - she's a big teddy bear. Ally is definitely the sunshine of the group. Any time we're all grumpy in the morning she's like, 'girls, it's going be OK and we're going to have a great day'. She's a very positive light and it balances the group out."

"Lauren is really, really caring. She cares so much about each and every one of us. Lauren's a good person to go to for advice on literally everything."

The girls, meanwhile, have teased a big announcement that's coming later today (February 12) via their official Twitter page and told their followers: "Guys, we got something SO exciting to tell you! We're not allowed to say until tomorrow though."

Watch the interview below: