I can't believe the Quizno sub commercials haven't mentioned, you know the one featuring the twisted, dancing, guitar-playing creatures with the horrible voices (I want to say hamsters). My favorite quote being, "They got a pepper bar!"
Geico commercials are cute and tummy-tickling as well.
As mentioned before, I also like the 7-UP commercials that featured Orlando Bloom and now the new guy who in the most recent one invites the grocery store shoppers to take free samples of 7-UP, but mishearing, they raid and take everything in the store.
As much as we think our country's ads are funny, tasteless or both, I have seen some foreign commercials aired that would classify as X-rated. The standards across the pond must be a little bit loose.