At the launch party for her Cosmopolitan cover on Feb. 13, Miley Cyrus gushed on two of the most important men in her life: Liam Hemsworth and Justin Bieber!

When asked whose idea it was to get sexy for her Cosmopolitan cover, Cyrus, sounding a little exasperated but remaining polite, says, "I guess it's always all my fault. I dunno." (We do know one thing that's her fault for sure: copies of her issue covering newsstands everywhere, even in places they're not supposed to be!)

Speaking of her Cosmo issue, Cyrus admits that she and fiancee Liam Hemsworth haven't discussed how much she gushes about his hotness in the mag's interview. "We haven't really talked about it," she said, looking either sleepy or something else. "I think it's all ... they take clips of whatever it is, and whatever I say about Liam or whatever he says about me and it makes it seem like that's the entire conversation, but you know it's like, a side note on a huge conversation," she explained. "But that's what people wanna read about."

Though Cyrus does actually, eventually answer the question. "I guess he takes it as a compliment I suppose," she says. "All these women are like, reading about sex in Cosmo, and then it's Liam naked in the pool!" She added, "I'm like, the only fiancee who pimps their fiancee out and talks about how hot they are."

Cyrus also admitted that she missed her pal Justin Bieber on 'Saturday Night Live,' which featured one sketch with the 'Beauty and a Beat' singer portraying Cyrus' fan club president. "I know! I'm such a bad friend!" she cried. She also joked that Biebs copied her hair. Girl, he had it first -- have a seat!