This on-again, off-again couple is back on. Alex Rodriguez and Cameron Diaz were spotted together over the Thanksgiving holiday frolicking in Mexico.

The baseball star was seen shirtless on the beach with a bikini-clad Diaz, 38. After first getting together over the summer, it was reported that the two had broken things off in October. "They break up and get back together all the time," a source told Us Weekly.

Rodriguez, 35, has been seen with a string of high-profile blondes since his divorce last year. In addition to spending Thanksgiving together in Mexico, the couple was seen reconciling recently over dinner recently in Hollywood and was also spotted together last week on a yacht in Miami. –AMY LEE