The six songs competing in Objetivo Eurovisión, the Spanish national final, have been released in full!
Competing are:

LeKlein – Ouch (Composers: David Ascanio, Vanesa Cortés, Albert Neve, Abel Ramos)
Maika – Momento Crítico (Composers: Rafael Artesero, José Juan Santana)
Manel Navarro – Do It For Your Lover (Composer: Manel Navarro)
Mario Jefferson – Spin My Head (Composer: Chris Wahle)
Mirela – Contigo (Composers: Tony Sánchez-Ohlsson, Isaac Luke, Ander Pérez)
Paula Rojo – Lo que nunca fue (Composers: Paula Rojo, Álvaro Bárcena)

The songs can be listened to over here(Click!).
Objetivo Eurovisión will take place next month and the winner will be representing Spain in the Eurovision Song Contest 2017 in Kiev in May.