The number 1 album this week is “Blue Slide Park” by Mac Miller, real name Malcolm McCormick.

Miller records for Rostrum Records, an indie label from Pittsburgh owned by a guy named Benjy Grinburg. It’s the same label that launched Wiz Khalifa on Atlantic Records. For the Mac Miller album, which is hip hop with melodies, Rostrum is distributed through Universal Music Group.

It does seem like Mac Miller’s success comes from hard work and social networking on Facebook, where he has more than a million friends. He also has million Twitter followers. All that translated into about 149,000 CD sales