09/25/2012 01:33 pm ET

Billie Joe Armstrong Had Been Sober For 12 Months, Drank Heavily Before Las Vegas Breakdown

Billie Joe Armstrong fell off the wagon while performing in Las Vegas over the weekend leading him to enter rehab, a family friend tells Celebuzz.

Claudia Suarez Wright, the ex-wife of Green Day drummer Frank Edwin Wright III (aka Tre Cool) confirmed Armstrong entered rehab today.

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