"SUPER" SERVED, UPDATE: Kings of Leon is back on radio with “Super Soaker,” the first single from Mechanical Bull (which is due out 9/24); check out the audio—and some neon eye-candy—in this clip. RCA’s Bill Burrs and Jeff Gillis have set up a huge launch at PoMo and Active, and the early reaction from gatekeepers has been extremely positive. With serious action on Pearl Jam and Avenged Sevenfold as well (not to mention the growth of Tame Impala), are we seeing a return to musical balance at Modern, with loud guitars having a bigger place at the table? And will that kid at UMPG ever learn the entire “Free Bird” solo? Stay tuned. (7/17p)