guitar Hasse Rosén guitar Lasse Wellander piano Lasse Holm producer Lasse Holm producer Torgny Söderberg Phonographic Copyright (p) Mariann Records Copyright (c) Mariann Records 'Having A Party' is the English version of 'Här Kommer Solen' while 'Day After Day' is the English version of the Swedish hit 'Dag Efter Dag'.