Eminem is up to his old celeb-bashing tricks in his new song 'A Kiss' with rapper-in-crime Royce da 5'9" -- and this time he takes aim at pop superstar Lady Gaga.

Together, Em and Royce are the rap duo known as Bad Meets Evil, and the two live up to their name in a hard-hitting track from their 'Hell: The Sequel' EP. In 'A Kiss,' Eminem calls out past rumors that suggested Lady Gaga was a hermaphrodite, suggesting she's not so much a "lady" at all. "Tell Lady Gaga she can quit her job at the post office/ She's still a male lady," Em raps. Apparently, Eminem wont be getting "a kiss" from Gaga anytime soon.

Gaga joins the ranks of Britney Spears, Moby and Elton John on Eminem's wall of shame, and isn't the only pop star to get a shout out on the track. Katy Perry and Nicki Minaj's names are dropped in a sexually implicit context.

Compare the brutal 'A Kiss' to the recently revealed Bad Meets Evil song with Bruno Mars' sweet vocals on an uplifting hook, 'Lighters.' Looks like Em is back to business as usual.