Eva Mendes unveils her PETA Ad ' Fur? I'd rather go naked ' on Robertson Boulevard - Photocall, Los Angeles, California - 20.12.07

Reports suggest the Hitch star is battling substance abuse issues, but full details weren't available as WENN went to press.

Sources tell TMZ.com that Mendes was admitted to Cirque Lodge last month (Jan08).

Mendes' publicist was not available for comment.

Source: WENN