Suite and Sour/Back in Black - S2-E4
Trivia: When Luna, Luan and Lola push the three guys out of their room, you can hear the Wilhelm Scream.

Luna: Lincoln why didn't you tell us you had a girlfriend?
Lincoln: I told you it gets awkward.
Lincoln: Surviving in a big family can be challenging, but it's not impossible.
Heavy Meddle/Making the Case - S1-E2
Question: In "Making the Case", why were Luan and Lily angry with Lincoln about the video? He didn't record any embarrassing footage of them.
Heavy Meddle/Making the Case - S1-E2
Question: In Making the Case, how did none of the sisters notice that Lincoln was recording them?
Answer: Throughout the episode it shows him capturing footage from hiding places like the bushes, in a tree outside a bedroom window, and through a cracked bedroom door. My guess is if he didn't have a hiding place for some of the sisters, he was far enough away they couldn't see him and he used the zoom function on the camera he was using.
Potty Mouth/L Is for Love - S2-E15
Question: How did Dr. Shuttleworth not notice that Lisa was pretending to be Lily? For instance, Lily has a small tuft of hair, while Lisa is bald.
Answer: Luan is mad at him because he broke the unspoken rule of posting a video without the person's consent. Lily is a baby and is probably impersonating the older sisters she looks up to. They are mad so she is mad.
oddy knocky