Two years of being the face of Yves Saint Laurent Beaute, Zoe Kravitz is partnering with the beauty brand to launch a new lipstick line under the already selling Rouge Pur Couture lipsticks. Hinted via her own Instagram handle captioned, “ME + YSL BEAUTE! STAY TUNED FOR MORE, SEPTEMBER 1ST”, was a posted video which filmed Zoe stirring a boiling …