I've never been a fan of Jennifer Garner, but she completely won me over as Jenna Rink, an awkward 13 year old trapped in the body of a successful, sophisticated 30 year old. I haven't seen a single episode of Garner's television series ALIAS, but I'm guessing she doesn't get the opportunity to flex her comedic muscles on that show very often. Too bad! In 13 GOING ON 30, she manages to be hilariously goofy and yet somehow incredibly charming at the same time.The major difference between 13 GOING ON 30 and the 1988 Tom Hanks film BIG is that Jenna doesn't simply just age seventeen years overnight. She actually lives the time between 1987 and 2004, though when she wakes up she's not aware of anything that happened to her during that time. In addition, her friends and family age along with her, again unlike what happened in BIG.Some of the film's funniest moments come right after Jenna's transfomation into the hip 30 year old she wished to be. She's literally floored by her own reflection, then shocked to discover a hunky, half-naked guy who calls her "Sweet Bottom" wandering around her posh NYC apartment. Being an 80's girl, she's clueless about modern technology so she's terrified by the sound of her own cell phone ringing. Baffled by the birthday wish come true, Jenna tracks down her childhood best friend Matt (Mark Ruffalo) in Greenwich Village. Unfortunately, Matt isn't too happy to see her since she treated him like dirt once she became a part of the snobby clique known as the Six Chicks. To her dismay, Jenna soon discovers that Matt isn't the only person she hasn't been very nice to over the years. She has her dream job as a top editor at POISE magazine, but it's clear that she's not the most popular person around the office. Worse still, she's no longer close with her parents. Despite everything, Matt helps Jenna adjust to her new life, and their friendship is restored. More than that, Jenna finds herself falling in love with her formerly dorky pal, but there's a problem--he's already engaged to another woman. Can Jenna make up for her past mistakes and win Matt's heart in the process? I'll just say this...the end will probably have you rolling your eyes, but it's still sweet. More importantly, thanks to Jennifer Garner's entertaining performance, getting there is tons of fun. Don't be surprised to see her get some recognition come awards season. At the very least, she should score a Golden Globe nomination, especially since the Hollywood Foreign Press has shown their approval of her work on ALIAS in the past.If you liked the 1988 Tom Hanks film BIG and/or the 2003 re-make of FREAKY FRIDAY starring Lindsay Lohan and Jamie Lee Curtis, you should definitely give 13 GOING ON 30 a chance. The movie also features lots of great 80's music, including everything from "Head Over Heels" by The Go Go's to Michael Jackson's "Thriller", to what I think is a lesser known Billy Joel gem called "Vienna".I promise you'll leave the theater with a smile on your face!