Katy Perry was so serious about music that she obtained a GED in her freshman year of high school so she could chase her dream. In 2008, the world heard her debut album One of the Boys, and they liked it. Now she's back on a release that features the chart-topping single California Gurls.

Multitalented artist Rihanna's follow-up to Rated R is her fifth album on Def Jam Recordings. It features the singles Only Girl (In the World) and What's My Name. Every single off her new album is the perfect Rihanna tune, tailored to her with a little West Indian vibe, a certain tone, a certain sass, and a certain energy. Loud reflects her attitude toward this new album.

After appearing on hit singles for B.O.B. (Nothin' on You) and Travie McCoy (Billionaire), Bruno Mars releases his first full-length studio album. Includes the single Just the Way You Are.