[Zevie Tannenbaum]" I want to do basic ken burns effect, but add the flickering colors... How would I create this on AE?"
There are many ways to do those flickering colors, but the key to many of them are blend modes [link].
You can create some nice color washes with colored solids (optionally masked and feathered), with the 4-Color Gradient effect, or with a particle system like Particular emitting large, colored particles.
You transfer the color wash onto the photography by varying the opacity of the color wash layer(s) and selecting a suitable blend mode (color would be an obvious starting choice, but you could get some pleasing results with others like screen or overlay). Audition them all to start to get a feel for how they can affect your images.
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If you don't have Particular, You can use CC Particle World 2 Simulation fro creating particles.
Choose Lens Convex as particle size, Change gravity value to zero, increase the Birth and Death size and increase the Radius X and Y in producer.
Now Precomp it and apply Tint and give any color you want to apply.
Using 4 Way color Gradient and solids with blend modes is one of the best way to apply the flickering effect as Walter has suggested as no third party plugin is required.
Here is an example: CS5.5 File