Which DJ duo peaked at No. 1 on the Artist 100 following the debut of their album 'Memories... Do Not Open'?

The DJ duo that peaked at No. 1 on the Artist 100 following the debut of their album 'Memories... Do Not Open' is The Chainsmokers. The album was released in April 2017 and marked a significant milestone in their career, further establishing them as prominent figures in the electronic music scene. The success of 'Memories... Do Not Open' included hit singles like "Something Just Like This," which contributed to their popularity and solidified their position in the music industry. The Chainsmokers' style, which blends elements of pop and electronic dance music, has resonated with a wide audience, leading to their chart-topping achievements.