leopard Hairband

We all know the Kardashian girls love to push the fashion envelope, but Khloe's animal print head scarf may be pushing it over the edge. We know it's cold outside and all, but still.

Kim's little sister arrived at LAX for her trip to New York ... flashing us a smile AND a black bra through her sweater.

The 27-year-old reality star and hubby of two years Lamar Odom, 32, are currently pursuing in vitro fertilization, according to Us. A source tells the mag, "She is desperate for a baby with Lamar and will do whatever it takes."

Khloe reportedly has been feeling the pressure to conceive since sister Kourtney announced she's pregnant with her second child.

Odom already has two children with ex-girlfriend Liza Morales ... 13-year-old daughter Destiny and 10-year-old son, Lamar Jr.