Surprisingly, perhaps, there are over 20 Focus vocal tracks of various sorts. Most of these feature Thijs Van Leer but there are a number of P J Proby vocals, of course, on the Focus Con Proby album and Bert Ruiter sang I need a bathroom on Mother Focus (though it is sometimes said that it is Akkerman). Akkerman can certainly be heard with Van Leer on Avondrood. Cyriel Havermans's voice is heard on Moving Waves. Jan Dumee sings briefly on Focus 8. On Focus 9 Jo de Roeck sings Just like Eddy.