Jessica Simpson doesn't want her daughter to grow up.

The fashion mogul, who has two children, Maxwell, three, and Ace, two, with husband Eric Johnson, admits she has no desire to pass on any of her wardrobe to her eldest child.

Asked what item of clothing she can't wait for her daughter to fit into, she said: ''I don't want her to fit into anything. I don't want her to grow up.''

The blonde beauty, who claims ''chasing my kids'' is her favourite form of exercise, also hinted she doesn't like getting older either.

She said: ''The best thing about being 35 is not being 36.''

Meanwhile, the singer considers her engagement ring her ''most treasured item.''

Eric proposed to her with a 1910 five-carat ruby Tiffany & Co. engagement ring from designer Neil Lane in November 2010 and she says it is still her favourite piece of jewellery.

She told PEOPLE: ''The accessory I never take off, other than my wedding band, my Jacquie Aiche bracelets.''

Jessica's fashion line is currently celebrating its 10th anniversary and she says the best thing about having her own range of clothing is ''always finding new ways to make my customers feel beautiful and on-trend''.