She was one Dr. Gerald Johnson's Polypropylene 'Silly String' patients. The number of recipients of this treatment has been stated to have been as few as 50, and as many as 200. The problem with the process was the wayward growth (sometimes causing uneven sizes between the two breasts as well as misshapenness).
Dr. Johnson came up with the idea of using this method, in the wake of the silicone-implants scare in the U.S. of the early 90's, and also to avoid some deflation and rippling problems that saline implants were known for. Most Polypropylene patients opted for 'housewife' sizes though because of unforeseen growth, ended up larger than they'd desired. Very few women opted to be super-sized. Chelsea Charms was 'implanted' with 2000cc's of the material, knowing she'd grow larger but not by how much. She has stated that while she has enjoyed the larger sizes (despite being cumbersome), she did not expect to ultimately become so large.
There was a mad rush of big-boobed starlets seeking Dr. Johnson's method in late 1999, when news of this process reached Eleanor(?) who ran Universal Entertainment (might be off on the names) which managed many of the feature strippers of the day. She put the word out to Minka, BB Gunns, Melonie Charms (GREAT Lady, btw) and others.
BB Gunns did only a modest amount of print work and videos. However, she can be viewed at two notably different sizes, with the Polypropylene. I believe that there are some very old images of her before the Polypropylene but I haven't seen them in a long time. Despite the amount of material out there, she has/had a large following in the big-boobed online community.
And anyone who is even remotely a fan of BB Gunns, would know that she deconstructed and got out of the business, many years ago.