Watch These Kids Fail Adorably While Playing Weezer's 'The Sweater Song'

Rivers gave 'em a shoutout -- so it's not all bad.

Oh man, this video of a bunch of kids playing Weezer's "Undone – The Sweater Song" will make you shiver with antici ... "Rocky Horror"-style.

Frontman Rivers Cuomo shared the vid -- titled "Rock Band Recital Fail" -- on Twitter the other night, which we think should come as some small comfort to this rabblement of tiny rockers. What incident befell them that necessitates said comfort? We'll let you watch for yourself...

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