The backlash is gaining momentum.
For a while there, it seemed like "Glee" could get any musician they wanted to sign off on the rights to use their music on the hit series. But then Kings of Leon refused and were publicly called out by creator Ryan Murphy.
Both sides traded petty, petulant comments, but now more musicians are rising up to get the Kings' back against what they see as bullying on the part of Murphy.
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"That 'Glee' guy, what a f***ing jerk," says Grohl. "[Murphy] is so offended that we're not, like, begging to be on his f**king show... f**k that guy for thinking anybody and everybody should want to do 'Glee'."
When asked if he's ever watched "Glee," Grohl admitted he had. Sort of.
"I watched 10 minutes. It's not my thing."