Lady Gaga also had a phenomenal year. The eccentric entertainer sold four million copies of her debut album 'The Fame' and the expanded version 'The Fame Monster,' was also a massive smash.

Country crossover sensation Taylor Swift may not be Kanye West's favorite artist this year, but that didn't stop her album 'Fearless' from being one of the biggest-sellers of '09.

The 19-year-old earned an impressive 8 Grammy nominations from the album and was named Entertainer of the Year at the Country Music Awards - making her the youngest recipient ever.

One of the biggest surprises in music this year has to be Susan Boyle. The 48-year-old Scot went from unknown to overnight sensation when her audition for "Britain's got Talent" became a huge hit on YouTube.

Her debut album, "I Dreamed A Dream," topped the charts in the U.K. and U.S. and is on track to repeat that success around the world.