Foo Fighters rocker Dave Grohl took aim at Britney Spears during his appearance as the guest host on talk show Chelsea Lately. During the show, Grohl said Spears seems off her game lately and looks a bit vacant. Dave is filling in for host Chelsea Handler during a special string of Grammy themed episodes of the show. He said: "She just kinda seems dead inside, like there's nothing behind her eyes . . . Like there's nothing in her boobs anymore!" The dig seems of little interest to Brit's management, however, who recently revealed that she is in "deep negotiations" for a Las Vegas residency. Her manager Larry Rudolph recently told Billboard that he would "be shocked if it didn't happen," and they are "hoping to have a deal done very soon." Copyright(c) 2013 RTTNews.com. All Rights Reserved