My opinion of the two songs..

The Video of the Jessie J. ft. B.O.B. - Price Tag:
I think that this song is talk about forget the price of things and try to smile, that the money don´t buy the happiness. Try yo smile with the simplicity of things and all the wordl forget the money and start dancing.

The Video of Travis McCoy - I Wanna Be A Billionaire:
this song is talk about that He wanna a Billionarie to buy things that he never hab and to be famous. He is a selfish for just want things for him.