Mick shocks L'Wren's sister

The sister of L'Wren Scott has lashed out at Sir Mick Jagger after the singer was photographed on the balcony of his hotel room in Zurich last weekend with a mystery brunette decades his junior. The Rolling Stones front man and notorious lothario was seen spending days with the woman - just under three months since his long-term fashion designer partner took her own life.

In one shot, Jagger is pictured sitting down on the balcony while the brunette leans in from behind and appears to kiss his hair.

Jagger picked up his new gal pal at a nightclub where she was working as a waitress, The Sun newspaper reported.

"He's worked very hard to get the Stones back on the road. He's a single man and he's Mick and he's having some fun. No one has a clue who this girl is - not even his security people," a source told The Sun.

None of that brought solace to Scott's outraged sister, however.

"His daughter says that he is still heartbroken and so devastated about losing my sister - and then you see these photos. He will never change," Jan Shane, 53, told the New York Daily News from her Utah home.

"And people wonder why L'Wren was so depressed?"

Jagger said he was "shocked and devastated" when Scott, his partner of 13 years, killed herself. He was in Perth and dining at Coco's restaurant in South Perth at the time of her death, about to kick off the Stones' long-awaited Australian tour.

It turned out the 49-year-old designer was nearly $US6 million in debt, even though her glamorous designs had been worn by Angelina Jolie and Michelle Obama.

The Stones were forced to cancel their Australian tour as Jagger said he couldn't understand "how my lover and best friend could end her life in this tragic way."

The band resumed touring last month and will play two shows at Perth Arena on October 29 and November 1.

"And people wonder why L'Wren was so depressed?"

Sunday People cover. Picture: Supplied