Aerosmith is set to have a huge weekend, but it seems the celebrations will be marred by internal politics. Joey Kramer is suing his bandmates, claiming that they’ve shut him out from returning to the drum kit.

He alleges that he was told to audition for the role he’s held for 50 years.

Responding to the suit, Aerosmith calls Kramer “our brother,” but says he can’t perform with them at either the Grammys or the MusiCares events because there won’t be time for necessary rehearsals.

The Boston rockers have invited Kramer to attend, just not join them on stage.

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