You know you have a special connection when you start harmonizing together on songs at the age of five. Oh, and you’re identical twins. That’s how deep the bond is between 14-year-old British brothers Max and Harvey Mills, who have gained social media fame with popular YouTube and musical.ly accounts, the teen heartthrobs racking up over 2.8M fans on the latter. Even though they can sing with incredibly accurate harmonies (and do so all the time on their YouTube videos), they take to musical.ly to post fun (and often funny) lip syncing clips, and to interact with their fans, issuing challenges to them like “Show us your favorite #ChristmasRecipe!” The two crooners also write original songs, with the video for their first single #OneMoreDayInLove set to drop in 2017.