The Day That All Hell Breaks Loose 2025 Get ready for one of St. Louis’ most explosive music events of the year! On Saturday, September 27, 2025, Atomic by Jamo will host a high-energy showcase of the region’s top hip-hop and R&B talent. Headlined by Rockwell Knuckles & Keem, Shana B, Bo Dean, Kenny Knox, Miistro Freeyo, Valencia Rush, Tru Wag, and many more, the night will feature nonstop performances, Streetstatus battles, and surprises — all hosted by T-Dubb-O. Originally founded by Tef Poe and carried forward by T-Dubb-O, this annual event has become a staple of the St. Louis music scene, spotlighting the best of the best for a night of pure, unhinged madness.  Atomic by Jamo, 4140 Manchester Ave, St. Louis, MO  Saturday, September 27, 2025 |  8PM – 1:30AM  Advanced Tickets: $15