Ok, don't quit your job and decide you'll pay off your mortgage by modelling lingerie RIGHT away. This video will not make you 7ft tall! But it does have some great ideas on training the gluteal muscles. What really works here is:

small pulses to fatigue the muscles
hitting different angles of the same group of muscles in sequence
using small weights for increased resistance

We do this sort of training in Ballet Sculpt - even if you're not training for vanity, having a strong butt supports your movement in daily activities and all sports. There's no downside to a strong butt!