He was drinking vodka and the flight was before 7AM!
This isn't the first time he's behaved badly after boozing. He was arrested for being drunk and in breach of peace back in 2007 in Dublin only 7 months after his second stint in rehab.
And in June 2009 he allegedly attacked staff at a bar in Paris' Charles de Gaulle airport just after he got out of rehab a THIRD time!
Sounds like someone needs yet another trip to rehab!
[Image via WENN.]