Ashlee Simpson doesn’t find her burgeoning baby bump quite as adorable as the rest of us do. The songstress has reportedly referred to herself as “Spongebob Squarepants” since becoming pregnant with her first child with hubby Pete Wentz; now the twenty-three year old mother-to-be is working out six days a week with Hollywood trainer Mike Alexander.

Mike, who previously trained Ash’s big sis Jess, is helping the “Little Miss Obsessive” star keep her weight gain in check with a light exercise regimen involving Pilates and a stationary bike.

Ashlee has gained twenty pounds since the start of her pregnancy.

“She’s still clinging to the hope that she can limit her total weight gain to no more than thirty to thirty-five pounds,” a friend tells Star.

At least one person is loving Ashlee’s new curves-husband Pete couldn’t be happier with his wife’s figure:

“Pete constantly reassures her that she looks fabulous. He especially loves her growing bust.”