Kristin, a cynical 34-year-old, drinks a mysterious champagne on Christmas Eve and wakes up seventeen years in the past, sharing a room with her 17-year-old self. Given the chance to change the worst Christmas of her life, she attempts to fix past mistakes, only to discover surprising truths about her family that may help her mend her present-day relationships.

Aspiring college cheerleader, Cassie Stratford consumes an experimental drug that grants her beauty and enough athletic ability to make the cheer squad. The drug has an unforeseen side effect — Cassie starts to grow and grow and grow!

With high school a distant memory, Jim and Michelle are getting married — and in a hurry, since Jim's grandmother is sick and wants to see him walk down the aisle — prompting Stifler to throw the ultimate bachelor party. And Jim's dad is reliable as ever, doling out advice no one wants to hear.

At a high-school party, four friends find that losing their collective virginity isn't as easy as they had thought. But they still believe that they need to do so before college. To motivate themselves, they enter a pact to all "score" by their senior prom.

When loser Marvin Mange is involved in a horrible car accident, he's brought back to life by a deranged scientist as half man and half animal. His newfound powers are awesome -- but their adverse side effects could take over his life. Now, Marvin must fight to control his crazy primal urges around his new squeeze, Rianna, and his rival, Sgt. Sisk, who both think he's one cool cat.