Singer Selena Gomez, who has just turned 22, was spotted getting wet and wild while celebrating her birthday in Saint Tropez.The Come and Get It hitmaker was seen getting close to a good looking guy who has not been seen with the brunette before. The mystery guy is said to be Tommaso Chiabra, reports eonline.com.The two were photographed exchanging ear-to-ear smiles as they jet-skiied together, with Selena holding on tight to Chiabra as he steered.Selena looked stunning in a black bikini top and white high-waisted shorts. Model Cara Delevingne was also spotted with the singer who flaunted her bikini body in a black two-piece. The singer later posted the image of an evening out with friends with a message, "Thank you SO much for my birthday wishes -this has been the BEST birthday yet! THANK YOU!!!! "There was no sign of her now-on-now-off boyfriend Justin Bieber.