Published on: May 2, 2001

Catherine Zeta-Jones is on the cover of the People magazine issue touting their "50 Most Beautiful People in the World" -- but she's had help!

The ENQUIRER issue that is on sale now reveals that the "Traffic" star -- who's only 31 -- has just undergone secret plastic surgery.

And our exclusive photos show Catherine entering and leaving the clinic where a famed Beverly Hills surgeon performed the procedure.

Our issue also discloses exactly what Catherine had done to her face, Julia Roberts' role in the operation, Catherine's husband Michael Douglas' own surgeries ... and much more!