Warren G has announced that he and Eminem will perform with Dr. Dre and Snoop Dogg at the duo's headlining set on the third night of the Coachella festival (UPDATE: the link has been removed from Warren G's website since this story was published). Kendrick Lamar and Daz Dillinger are also confirmed to perform as part of Dre and Snoop's set, and Rolling Stone has learned that Wiz Khalifa will also make an appearance.
It is unclear whether or not all of Dr. Dre and Snoop Dogg's guests will appear at both of their Coachella appearances, as the duo are set to headline on April 15th and 22nd. There is some possibility that the shows will vary somewhat, and that other guests may be announced later, or appear on stage without notice.
UPDATE: Warren G's spokesperson has released the following statement denying that the rapper made this announcement on his website: "Warren G is not announcing that he and Eminem will perform with Dr. Dre and Snoop Dogg. Warren had no knowledge that any such announcement was being made until after it was posted. Any postings involving him and other artists were made without his knowledge or consent and he is not willing to confirm or deny anyone's involvement in this years Coachella event. We apologize for any confusion that this caused."
Sources tell Rolling Stone that all of the above-mentioned surprise guests are still scheduled to join Snoop and Dr. Dre at Coachella. Whether any fallout occurs over the leaked news by the weekend, however, remains to be seen.