The formula for getting that No. 1 hit album has gone through a lot of transitions.
While the movie breaks box office records, its soundtrack debuted at number-one on the Billboard charts.
Whether a song becomes a hit will depend where people listen.
L.A. company Walldogs company hand-paints those ads found on the sides of buildings.
But how much will it change album rankings?
After the failure of their music app, Twitter tries to get back in the game.
On the day digital billboards spread news of the Boston Marathon bombing among Boston drivers, a judge's decision turned off digital billboards in Los Angeles. Cities and advertising companies argue over the bright billboards' value.
The site is a mecca for musical artists. Now their YouTube hits can send them to the top of the Billboard charts.
Rapper Lil Wayne has surpassed Elvis Presley's record of appearances on Billboard's Hot 100 chart.
Sometimes a little tweet is all it takes to catapult a relatively unknown artist to the top of the charts.
