Jessie J feat. B.o.B – Price Tag (2011) Jessie J feat. B.o.B 2011 Price tag Did you know that... In economic theory, the “demand” for a product or service is determined by its price. How the demand changes as the price fluctuates is known as “price elasticity”. Just like many other theories, this is a simplification of reality. How does this song make you feel? Report abuse SHARE THIS WITH YOUR FRIENDS