Aleks Berditchevskaia was a keyboardist and lead vocalist for Los Campesinos! from their formation in 2006 until 2009.
She left the band to continue her studies, however she joined the band for the recording of their live album, A Good Night For A Fist Fight, in 2012. She performed for the last two songs of the set, as a farewell to former bassist Ellen Waddell.