In 2007, she was chosen as part of the 6-member teen group Pop System (sometimes Popsystem) for the French children's series Iapiap!
In November 2008, she took part in the M6 reality television series La France a un incroyable talent where she reached the finale.
In the finale Costa performed "I Will Always Love You" by Whitney Houston and finished runner-up for the season with the title going to Alexandre, a fire juggler.
The EP included besides "Qui je suis", an instrumental version of the same song, also "Mon secret" and a cover of "Take a Bow".
[8] In December 2011 her single "Je t'ai menti" was released in duet with Swedish upcoming artist Ulrik Munther alongside a music video that was first broadcast on NRJ Hits.
The cast of the musical comedy includes Matt Pokora, Stephanie Bedard, Caroline Costa, Sacha Tran, Dume, Nyco Lilliu and Marc Antoine.