Rolling Stones frontman Mick Jagger has posted a heartbroken tribute to his girlfriend, fashion designer L'Wren Scott who was found dead in her New York apartment yesterday.

49-year-old Scott, who was a stylist for Michelle Obama and Madonna among others, had been romantically linked to Jagger since 2001.

Jagger heard about her death in Perth, Australia, where The Rolling Stones are currently on tour.

Earlier today, he penned a heartfelt tribute on his Facebook page:

"I am still struggling to understand how my lover and best friend could end her life in this tragic way. We spent many wonderful years together and had made a great life for ourselves.

"She had great presence and her talent was much admired, not least by me.

"I have been touched by the tributes that people have paid to her, and also the personal messages of support that I have received.

"I will never forget her."