A Vegas waitress tripled in size — now a showroom headliner — falls for the scientist who accidentally enlarged her. She vows to save him when he’s kidnapped by her vengeful ex, a blackmailing mobster and a haughty former showgirl.

"When the scientist she fell in love with is kidnapped,? a 30-foot-tall showgirl rampages through vegas, and the national guard in order to save her lover from the mobster who took him."

Maybe:

After a scientist turns a waitress into a giant, he is kidnapped by mobsters and she must rescue him before she returns to normal.