iTunes is pretty happy with the holiday season as music sales were at an all time high this week. It’s actually a big week for music as sales weren’t just up on iTunes but also in CD stores. That’s a shocker! The big winners of the week in sales with Katy Perry and Bruno Mars, whose recent singles “Firework” and “Grenade” respectively, both went by 164% this week. I guess that would mean a 4th week atop the charts for Katy. As for the best selling albums for the week, Taylor Swift is still on top with another 276,000 units sold, followed by Susan Boyle with 240,000 sold and “Glee’s” Christmas CD with 160,000 units sold.