Memorable TV Transformations 

Another reality star to make a major metamorphosis was 'American Idol' runner-up Clay Aiken. Nevermind how different 'The Celebrity Apprentice' star looks these days, the scrappy singer went from scrawny lad to polished pop star from auditions to the finale. Invisible? Hardly. 

The television series with the most transformations has to be, pound for pound (sorry), the inspirational reality hit 'The Biggest Loser.' With contestants losing thousands of pounds over the course of 13 seasons, you never see the same people leave as the ones you see enter. 

Of course, not all reality television transformations are positive. Exhibit A turned Exhibit DD: 'The Hills' star/fame cautionary tale Heidi Montag. Montag went from a bubbly beach blonde to a real-life Barbie when she underwent a series of plastic surgeries (at one point, 10 in a single day) and became all but unrecognizable from the girl we met on MTV. Even scarier than Spencer Pratt. 

One could argue that Matthew Perry had the most amount of transformations during the run of 'Friends' (at one point a confused Joey said he looked 'a little like a French guy') but his on-screen wife Courteney Cox looked vastly different from the start of the show to the end. And hey, long before there was Fat Mac, there was Fat Monica. 

It's funny to remember there was a time when we all looked at Jennifer Aniston and thought, 'Rachel!' While the actress got better and better as the show went on (she snagged an Emmy later in the series' run) after a while it was hard not to look at her and think, 'Didn't I just see her on 700 magazine covers!' While Rachel may have been the girl next door at the start, she looked like a Hollywood star by the end. Gunther likely didn't  mind. 

Going back and watching the first season is uncomfortable. Not just because the show hadn't quite found its footing, but seeing how wrong some of the characters were off the bat. Like Michael Scott, the first variation of Mindy Kaling's Kelly Kapoor was starkly different. From her dowdy clothes to her meek demeanor, that Kelly wouldn't even dare to cross paths with the fashionable, jabbering Kelly Kapoor we now know and love. Sometimes change is, like, such a good thing. 

Being a young person is hard enough as is, but imagine growing up in front of the camera with every imperfection broadcast. (And you thought middle school was horrifying.) While 'Drake and Josh' star Josh Peck may have gone through an awkward phase on television, the actor dropped a staggering 100 pounds in the span of a few years. On behalf of teased kids everywhere, Peck became someone to look up and aspire to. 

Another television star with a noticeable weight transformation was actress Sara Rue. The star, who has appeared on series like 'Less Than Perfect' and 'Popular', struggled with her weight, but was looking slim and sexy by her turn on 'Rules of Engagement.' 

Turning into a vampire, you're bound to undergo some transformations. Just ask Tara (Rutina Wesley). But becoming a vamp on 'True Blood' makes you just that: a vamp. Wesley's Tara has gone from tough Southern belle to sexy beast.