According to French radio DJ Zegut, Rammstein will play at the Pinkpop Festival 2016.
We can be very sure about this news, because this DJ also leaked the news about Metallica playing at this festival and Rock Werchter in 2014 and that news was correct. He also told us in 2012 that The Prodigy would play at the Main Square Festival some time before it was announched officially.
Source: Festileaks.com
