Fifth Harmony to join one lucky fan and a friend for a makeover and styling session

The girls of Fifth Harmony have teamed up with MTV's Ultimate Fan Experience campaign to offer one lucky fan and their guest a once-in-a-lifetime prize.

The lucky competition winner will be invited to a makeover with the 'Sledgehammer' beauties and will also join them for a special styling session with their glam squad. Songstress Ally Brooke Hernandez explained that she's really excited for the event to happen once the successful entrant has been chosen:

"We love our fans so much and can’t wait to have the winning harmonizer meet us in Orlando for MTV’s Ultimate Fan Experience. The lucky winner is going to get the ultimate VIP treatment from our amazing glam team and we’ll all have so much fun."

To be in with a chance of winning, click here. The contest will end on December 22, 2014 and according to MTV's official rules is open to U.S. citizens only.

The stars, meanwhile, just returned from the UK after being in London to perform 'Bo$$' on 'The X Factor'. Dinah Jane Hansen admitted that she had an amazing time in the city: "LONDON!! I am gonna miss ur pastries & NANDO's chicken wings!! And all the pretty faces we met these past couple days!! So gonna miss you's."

Watch the girls hiking in Tennessee below: