Miki Serra became known as the singer and composer of the group Sexy Sadie, with whom he recorded the LPs Draining Your Brain (1994) and Onion Soup (1996). His first compositions are in English and they recognize the influences of Pixies and The Beatles, which, according to him, were the reason why he bought his first guitar. In this first stage of Sexy Sadie Miki shared compositions and responsibility in front of the microphone with Jaime García Soriano.

After leaving Sexy Sadie took the name Plastic Face to present her LP Breakfast Time (2003). As is clear to Sexy Sadie's fans, the name of the band is taken from the song with the same name included in the first album of the Mallorcans. The recording of the album was made in October 2001 at Little Eye Studios (Palma de Mallorca) by Angelo Borrás (guitarist and producer of Sunflowers). For this recording he surrounded himself with great musicians such as Toni Toledo, companion on Sexy Sadie (drums); Paco Loco from Australian Blonde (guitar); Xisco Juan del Diablo on Ojo (bass); Xavier Escutia, from Los Valendas (choirs) and Mané Capilla from Sunflowers (percussions). Later Paco Loco himself mixed it in his studies and it was mastered in Boston (USA) by Jeff Lipton. But, as Miki himself said, "Plastic Face was created to last a short time, an album at most, with its presentation on rare occasions in some halls and festivals. Plastic Face was born with an expiration date.

Later he formed Post, with which he recorded the LP No Sleep (2007), and with some song in Spanish. In this group, which deserved to have more repercussion, Miki changed travel companions, joining in this occasion, for the recording, with Miquel Puigserver on guitar, Biel Mavet on drums and Juanjo Tomás on bass. This work was recorded in the Urban studios in Palma with Rafa Rigo at the controls.