What makes Für immer by Unheilig notable?

The single 'Für immer' achieved significant commercial success, reaching high chart positions in Germany, including number one on the German Singles Chart. The album further established Unheilig as a key player in the Neue Deutsche Härte movement, influencing subsequent artists within the genre. Released on May 21, 2010, 'Für immer' marked Unheilig's transition into mainstream success following their breakthrough album 'Zelluloid' in 2009. This album helped solidify their position in the Neue Deutsche Härte scene while appealing to a broader audience through its melodic hooks and introspective lyrics.