The next generation of Hollywood starlets is sticking together. It looks like celeb offspring Rumer Willis and Zoe Kravitz are new best friends, as they playfully mugged for the cameras at the DKNY Delicious Night perfume launch in NYC last night. Of course, they know how to work the cameras — Zoe, 18, is the daughter of Lenny Kravitz and Lisa Bonet, while Rumer, 19, grew up watching mom Demi Moore, dad Bruce Willis and mom's husband, Ashton Kutcher, all turn on the charm for the shutterbugs. Thankfully, Rumer's washed that blond right out of her hair and gone back to brunette. Smart move.