Green Day's Billie Joe Armstrong Labels Psy 'The Herpes Of Music'

Green Day frontman Billie Joe Armstrong has lashed out at South Korean pop star Psy, calling the "Gangham Style" singer "the herpes of music."

Armstrong made the comments on his Instagram account, posting a picture of Psy alongside the caption: "This dude is the herpes of music. Once you think it's gone, it comes back. #herpes #flareup #pleasegoaway."

Armstrong is a frequent user of Instagram but has rarely used it to pass comment on other musicians, preferring instead to share pictures of his bandmates and on the road updates.

Green Day returned to the stage for the first time since Armstrong's onstage breakdown and subsequent stint in rehab at SXSW earlier this year. The band appeared at Austin's Moody Theater, one of the festival's biggest venues.

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