Keeping Up With the Kardashians star Kendall Jenner is celebrating her 21st birthday today. The model has accomplished a lot in a short period of time, from gracing the cover of Vogue to recently buying a Ferrari. The reality star recently bought a house in the Hollywood Hills next to late night host Jimmy Kimmel. Earlier this year she became the face of Estee Lauder and walked in a Victoria Secret fashion show. Jenner also started a clothing line with fashionista sister Kylie Jenner.