Emimem's return to hip-hop is now official.

After months of rumors, the MC announced the title for his sixth album, "Relapse," last night (Oct. 15) during an on-air launch party for his book, "The Way I Am" via Orion Books. Eminem also introduced a new track, "I'm Having a Relapse."

"There's a lot of album titles floating around that are fake albums titles," Eminem told Shade 45 hosts DJ Kayslay and Angela Yee on Sirius Satellite Radio.

While no release date has been confirmed, the set is rumored to hit shelves before year's end. During the Shade 45 broadcast, 50 Cent hinted that "Relapse" may even arrive before his own new album, "Before I Self Destruct," due Dec. 9.

Eminem's last release, 2005's "Curtain Call: The Hits," has sold 2.9 million copies in the United States, according to Nielsen SoundScan. His last studio album was the previous year's "Encore," which has shifted 5.1 million.

Representatives for Interscope were unavailable at deadline.