Newly single Jennifer Lopez is back on the prowl for a new man, and Star has learned that her sights are set on Eva Longoria's boyfriend, Jose Antonio Baston. The 45-year-old singer threw girl code out the window when she was recently spotted on a dinner date with the Televisa network executive. Sources say that while a vulnerable Jen will go on a date with "just about anyone" at this point, her reason for picking Jose is extremely personal. Since photos surfaced of Eva, 39, sitting on the lap of Jen's then husband, Marc Anthony, in 2008, the two women have been involved in a bitter rivalry.

"Jen knows exactly what she's doing," reveals the source. "She wants to get under Eva's skin." And it seems to be working! The Desperate Housewives actress and Jose, 44, were spotted making their way through Heathrow airport on July 16 looking glum. (Print Edition)