heathermorrisfitness230size.jpgHeather Morris is opening up about her boob job ... and why she had her implants removed earlier this year.

The 24-year-old Glee star tells Fitness magazine:

    "I DID get a boob job... but I've already had my implants removed. It was hard being active with them, because my chest was always sore. It hurt a lot, and I didn't like being in pain - so they had to go!"

Morris, who plays cheerleader Brittany on the hit Fox show, also discusses why she got the fake breasts in the first place. She adds:

    "Implants were something I thought I wanted when I was younger, and now I don't."

As for the body she's striving for ... the Glee star says, "Gwyneth [Paltrow] has a killer body, so I'm willing to try whatever she does to look like that!"