Here are some photos and a video, courtesy of our friend Patrick. The links were posted on a previous thread, but I thought it would be a good idea to have the whole thing as a post so you could see everything from the comfort of your palingates armchair.
Bristol in December 2006, June 2007, September 2007, October 2007, April 2008 and May 2009
(click on photos to enlarge)
I don't think Bristol is naturally "tubby". In December 2006, June 2007 and May 2009 she looks quite slender. The same can't be said of her appearance in September and October 2007. Unfortunately, there are no photos of Bristol between from October 2007 until April 25, 2008. Coincidence?
There's one little coincidence I can point out: J-Lo was pregnant with her twins on the MTV video. She disguised it well, with her large zebra striped outfit, but she went down the steps very gingerly, unlike Sarah Palin and Bristol when they were respectively "pregnant" with Trig and Tripp...
There are loads more photos here.