Mick Jagger dating again?

Singer Mick Jagger has sparked rumours that he's dating a mystery brunette after being spotted flirting with her on a hotel room balcony in Switzerland.

The Rolling Stones rocker was photographed smiling and having fun with a mystery girl on the balcony of a hotel room last weekend, reports contactmusic.com.

"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 the security people," a source told The Sun newspaper.

The 70-year-old was left devastated when his partner L'Wren Scott, 49, killed herself in her Manhattan apartment March 17, but his new pictures with an attractive woman several decades younger than him suggest that he's starting to put the tragedy behind him.

The two reportedly met at a nightclub in Zurich, where the Rolling Stones were on tour, and spent the weekend enjoying each other's company, before emerging on the balcony on the final day.

"It was just nice to see Mick smiling again. Zurich is beautiful and he was obviously enjoying what the city has to offer," said a source.

The Rolling Stones, also consisting of Keith Richards, 70, Ronnie Wood, 67, and Charlie Watts, 73, cancelled their gigs in Australia and New Zealand in March while Mick grieved for L'Wren, whom he had been dating for 13 years.