CHR = Contemporary Hit Radio.
FM/WB are very clever with their lead FM studio singles. I remember the interest concerning the oohs and ahhs at the end of "Big Love" when it came out. The whole "is that Stevie grunting with Lindsey?" mystery.
Now it's "Peacekeeper" coming out right before a major war. Is that clever marketing or what? Like they say, timing is everything. We shall see.
Someone commented on one of the threads that PK was too pop. It's like "HELLO" FM usually releases what are considered "pop" singles. They are a pop/rock band.