BitterSweet Festival returns to Poznan, Poland from August 13-16, 2026, featuring an impressive lineup of international rock, electropop, indie pop, art pop, and pop artists. Headliners include Grammy-winning New Zealand sensation Lorde, British virtual band Gorillaz, and American duo Twenty One Pilots, alongside Canadian indie pop artist Charlotte Cardin, German electronic acts Meute and Paul Kalkbrenner. The four-day festival showcases a diverse mix of contemporary pop and electronic music, drawing acclaimed performers from New Zealand, Canada, the United Kingdom, United States, and Germany. Music fans can expect a carefully curated blend of indie pop sensibilities, electronic innovation, and modern rock energy across the festival's duration.