Reinforcing its lengthy journey to multi-format radio acceptance, "Radioactive" debuts at No. 26 on Adult Contemporary … 46 weeks after it launched on Alternative, where it went on to spend a hefty 13 weeks at No. 1 beginning in March. The song continues to ripen at other formats, pushing 5-2 on Adult Top 40, bulleting at No. 3 for a second week on Mainstream Top 40 and, in its fifth week, rising 14-13 on the adult alternative Triple A chart. What elements have led to such a "Radioactive" boom?
