While Brittany is preparing a class speech on inner beauty, an endangered species makes its home on her face.
While Simon, Theodore, Jeanette, and Eleanor go to space camp, Alvin and Brittany head on a field trip to an animal preserve. The class gathers around a display of endangered suck toads, and, after Alvin acknowledges Bocarter's insult to Derek, he's shoved into the display which flings the toads onto Brittany. One of the toads decides to call Brittany's face home and the doctor requires her to wait for a specialist to fly in from New Zealand to remove it. Alvin's convinced Brittany won't take care of it so Miss Smith makes the job his sole responsibility. Following a Skype session covering the care for the animal, Brittany is none too eager to change her behavior for the toad. To make matters worse, she's publicly humiliated at the expense of the toad. Having been uninvited to every party, Brittany tries to get her life back to normal as Alvin does his best to continue to care for the creature. The specialist checks up on them to discover the toad in poor shape due to its hostile environment. Seeing she's its only hope for survival, Brittany changes her attitude and works with Alvin to nurse the toad back to health. She gives her report entitled "Beauty Is Only Skin Deep" and the specialist removes the suck toad from her face.
- "Stuck on You" 
- Skype is the third real-world registered trademark mentioned in the series. The first two being Pillsbury in Mancave and Photoshop in Double Trouble.
- This episode marks Simon's first appearance as a cameo in the series.
- When this episode premiered in the US, it aired with a rerun of Liar Liar.