The Wingman commercial is hilarious. I also laugh every time I see the AFLAC duck (for some odd reason)
There's another commercial that cracks me up - it's for a car manufacturer (Volkswagon?). There's a guy staking out a silver car and all of a sudden he sees another couple coming out to look at the car so he decided to lick the door handle to 'claim' it. I laugh every time I see it.