Natural Brazilian Butt Lift
This one is great and I know it will be effective [if I actually stick with it :)]
OMG: Oh My Glutes
This one is all about cardio and working the butt and thighs; it's a good one.
8 Minute Abs
I actually came across this one last year, but forgot about it and "found it" again this week. The video is a bit dated, but the exercises aren't. You will feel this one for sure!