The challenges continue in an effort to raise funds and awareness of A.L.S. Lou Gehrig's disease.  

This time around it's the Zac Brown Band in what could be easily deemed the ultimate of all "ice bucket challenges."

Zac Brown accepted the challenge from Hunter Hayes and Vineyard Vines in unmistakable "Zac Brown" fashion.

And he continued the effort with challenges for Jimmy Buffett, Foo Fighters, Bob Lefsetz and Garth Brooks.

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