Cyrus is the star of "Hannah Montana: The Movie," which was No. 1 at the box office last weekend.
Foxx and his Foxxhole crew started bashing Cyrus after someone called into Foxx's Sirius satellite show Sunday to criticize the teen for vowing last month to "ruin" the rock band Radiohead for declining to meet with her at the Grammy Awards show.
E! News said Cyrus was referred to on the radio show as a "little white bitch" and advised to "do some heroin" and "make a sex tape and grow up." Several people are talking during the segment and it is unclear who exactly made the "bitch" remark.
"She's gonna ruin Radiohead's career? The same Radiohead that gets paid $1 million just to sample their songs? Make a sex tape and grow up," E! quoted Foxx, a comedian, actor and singer, as saying. "Get like Britney Spears and do some heroin. Do like Lindsay Lohan and start seeing a lesbian and get some crack in your pipe. Catch chlamydia on a bicycle seat. That's what I want."
E! News quoted Cyrus as indirectly addressing the matter by saying on her Twitter page Monday night, "If you can't say something nice, don't say anything at all."