San Marino selected their Junior Eurovision Song Contest 2014 entry through an internal selection. On 26 September 2014 it was revealed that The Peppermints would represent San Marino in the contest with the song "Breaking My Heart".
On 26 September 2014, it was revealed that the Italian/Sammarinese girl band The Peppermints, would represent San Marino with song named "Breaking My Heart". The state broadcaster San Marino RTV established a partnership with the youth singing contest "Vocine Nuove di Castrocaro" (New Little Voices of Castrocaro) to select the group's members.
The band is formed of Raffaella Perniola from Palagiano, Greta Doveri from Cascine di Buti, Anita Simoncini from Montegiardino, Arianna Ulivi from Galeata and Sara Dall'Olio from Cervia. Raffaella and Greta were 14 at the time of the performance and Anita, Arianna and Sara were aged 15. Greta previously won the Sanremo Music Festival Junior competition, having competed in the TV talent show Io canto. Raffaella's brother participated in Junior Eurovision Song Contest 2013.
Their song "Breaking My Heart" was written by Antonello Carozza, Chris Lapolla and Luca Medri. The music was composed by Chris Lapolla and Luca Medri. The lyrics for the song are partially in Italian and partially in English.
At the running order draw which took place on 9 November 2014, San Marino were drawn to perform third on 15 November 2014, following and preceding .
The group finished in 15th position, receiving a total of 21 points.
The Sammarinese votes in this final were based on 100% jury. The following members comprised the Sammarinese jury: