I'm not going to sugar coat it: this movie stinks. After the gut-busting hilarity of the 2009 original, this comedy franchise has been struck down with a severe case of sequel-itis. The carbon-copy second instalment was stale for the most part yet still managed a handful of laughs thanks to the general funniness of Zach Galifianakis' socially demented Alan; this episode however, is almost completely devoid of humour. The writing has become increasingly reliant on the natural charisma of the headlining star trio - with the plot here being laborious and woefully lazy - and the irritating Chow (Ken Jeong), the weakest link in part one, inexplicably gets even more screen time to screech and make our eardrums bleed. If it weren't for an amusing set piece atop Las Vegas' Caesar Palace hotel and a best-for-last gag during the end credits, I would've given this the one star treatment. I was desperately hoping this series would regain some form and finish with a bang, but unfortunately the wolf-pack's last adventure barely makes a whimper.