When it comes to high heels, celebrities are obsessed with Christian Louboutin's transparent cap-toe pumps. Everyone from Jennifer Lopez to Rihanna to Beyoncé to Kristen Stewart to Kim Kardashian is wearing the trendy shoe on the red carpet, at basketball games, photocalls, and even on the streets. Jennifer Lopez even wore a red-hot pair with her red Tom Ford dress at her birthday celebration in NYC. These pumps are so popular, they're practically sold out online. Find out which other stars are obsessed and how they wore their pair.