Photos of naked Kemp Muhl. Charlotte Kemp Muhl is an American model, singer, and musician from Atlanta, Georgia. Modeling since the age of 13, Muhl, at 16 years old, became the youngest model to appear on the cover of Britain’s Harper’s and Queen magazine. Muhl has been in a relationship with Sean Lennon since 2006. Muhl is a singer/songwriter and also a multi-instrumentalist, with the instruments she plays including, guitar, bass, keyboard, and the Bayan (accordion). Lennon and Muhl are involved in a musical project, titled “The Ghost of a Saber Tooth Tiger”. The couple has also formed the record company “Chimera Music”. Muhl has a successful modeling career, and has been featured in campaigns for Tommy Hilfiger, Sisley, D&G, Donna Karan, Maybelline, Swarovski, and Jennifer Lopez’s brand J.LO. Age 28 (August 17, 1987).