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.

Enjoy the ever famous Lady Gaga and her songs for the piano, vocal and guitar.

Here is Michael Bublé's self-titled debut album featuring a range of standards from various eras.