I would suggest just bending her over, or taking a shitload of clones if you need them like others suggested.
In the future, keep your light as close as possible to your plant and raise it as you allow your plant to grow up. Im using an eight bulb T5 fixture currently, and while I knew more lite = thicker growth I hadnt expected my girl to get so bushy. I attempted a mainline on her (theres a big post with Mainlin in the name, read it if you have time) and got pretty close, then I just kept the light about two inches away or so from the top of the plant.
Im still vegging, waiting for clones to take root before I flip to flower, but this is the bushiest I have managed to get a plant. Looks a lot like ebcrews auto a few posts up, and I have never had that thick of a canopy
Anyhow, good luck with your grow! Just remember to train early and often, and to keep your light as close as you can throughout the grow. And dont be scared to train, the plant can take it. Kind of like a Bonsai I guess.