Songs that leaked from Dr. Dre's Detox recording sessions earlier this year revealed that Nas and R. Kelly are among the artists in consideration to appear on the long-awaited opus. And T.I., Lil Wayne and Drake are among the MCs believed to be ghost-writing for the album.

But if Dre gets his way, a certain renowned Brooklyn rhymesmith will be pulling double-duty on Detox, both writing and delivering a guest verse.

"Well, actually, Jay-Z's just been in the studio doing some writing," Dre told MTV News on Friday while promoting his new Beats by Dr. Dre/ HP notebook collaboration. "Hopefully I'll get him to perform on the record. Jay, come holler!"

Detox is the follow-up to Dre's 2001 album and will complete the trilogy that began with 1992's The Chronic.

In May, a snippet of a Detox track was released on a Dr. Pepper commercial that features Dre. The song, tentatively titled "Sh-- Popped Off," features production similar to a track that leaked in February with Tip referring Dre.'s vocals. "It's the D.R. ... Made the West side worldwide, no PR/ Gangsta-rap God, I'm the end-all, be-all/ California love from the Bl oods to the C-Dogs."

Earlier this month, Dre told ABC News he'd like to finally put the finishing touches on Detox by the end of this year in time for a 2010 release. "Hopefully, I'll get it done at the end of this year, and we can hear it next year," the normally press-shy producer said.