"I already told him that this baby, whether it's a boy or a girl, is going to be the best-dressed baby there is," Kelly 26, told Us Weekly at Macy's Material Girl Search in New York City Wednesday. "'You're not buying the clothes -- I am!'"
Kelly, who said she's "very, very excited" to become an aunt, certainly knows a thing or two about fashion: she was in the Big Apple to find the next Material Girl spokesmodel with Madonna's 15-year-old daughter, Lourdes Leon.
"This is not just a model position," Kelly explained. "You are a spokesperson and you have to do appearances, so you have to be a good public speaker and have confidence in who you are."