No surprise: Eminem’s “Relapse” brings the rapper back to familiar ground — the No. 1 slot on the Billboard 200. With 608,000 sold in its first week, it not only nets the biggest sales week of the year for any album, but the best since AC/DC’s “Black Ice” began with 784,000 copies last October.

It’s Eminem’s fifth straight No. 1 debut — and fifth overall No. 1. His only album to miss the top spot was his “Slim Shady LP” debut, which bowed and peaked at No. 2 in 1999.

His last studio set, 2004′s “Encore,” arrived with 711,000 after an abbreviated debut week — it was released four days earlier than scheduled in order to counter leaks. A little over a year later, his greatest hits package “Curtain Call” took the stage with 441,000 in December 2005. Collectively, his six albums have sold 34 million in the U.S., making him the biggest selling hip-hop act in the SoundScan era (1991-present).