Continuity mistake: When Amy puts Gabe on the spot by asking if she's "really smokin'" for a pregnant woman, Amy strikes a pose with her water bottle in her left hand, but in the closeup the bottle is suddenly in her right hand.
Good Luck Charlie (2010)
1 continuity mistake in season 3
Other mistake: When PJ tells Gabe about the attic, he said he had never heard of the attic. But in the earlier episode "Charlie Shakes It Up" Amy tells Gabe to clean out the attic while she's away.