Claude says:Balthazar are a Belgian indie pop group from Kortrijk and Ghent who won Humo's Rock Rally in 2006 and broke through with their widely praised 2010 debut Applause. Thin Walls sounds like crisp, polished guitar pop with a bite — hooks that lodge themselves in your head and a cool reserve that keeps them from feeling too easy. You picked it up in August 2026, a full decade after it came out, and gave it serious attention that month.