Diaz, A-Rod spotted "grinding" together

Cameron Diaz was seen "grinding" on Alex Rodriguez at a party on Saturday night, according to reports.

The My Sister's Keeper actress, who broke up with model Paul Sculfor last year, was reportedly spotted flirting and gyrating with the New York Yankees baseball star at the Miami event, which was attended by celebrities such as Tom Cruise, Jessica Alba, Kevin Connolly and Adrian Grenier.

An onlooker told OK that Rodriguez was sitting down while a "tipsy" Diaz "was dancing by herself", until she gyrated towards him and began "grinding" against him in a "fun and flirty" manner.

Witnesses also said that Diaz chatted with fellow partygoer Katie Holmes, saying: "They were having a great time."

Rodriguez reportedly broke up with Kate Hudson in December last year, while Diaz has previously been romantically linked to John Mayer, Matt Dillon and Justin Timberlake.