Eric Clapton helped raise $1 million for Democratic candidate Robert F. Kennedy Jr.’s presidential campaign at a private fundraiser on Monday night, Kennedy’s campaign announced Tuesday.

Clapton and his band performed at an event, which raised a total of $2.2 million, including $1 million for Kennedy’s campaign and $1.2 million for a political action committee supporting him.

“I am deeply grateful to Eric Clapton for bringing his musical artistry and rebellious spirit to my gathering in Los Angeles last night,” Kennedy said in the press release, which described the Monday night event as a “once-in-a-lifetime musical performance.”