It's Called SPANX, Jessica Simspons. SPANX! Look Into It! (Photos)

Jessica Simpson raised many eyebrows with her full figure as she left her hotel in New York City, New York on September 8, 2010.

The songstress had made a habit of wearing slimming black, but unfortunately for her on that day it didn't work.

However, just a short few days later on September 15, 2010, Jessica stepped out for a Macy's event, and was looking decidedly slimmer. What could her secret be? A really good diet, or even better figure control undergarments?

Or let's just face it people--SPANX!