The former talkshow host, who admitted to being "inspired" by Kirstie Alley's weight loss transformation on the show last season, said that she hopes to follow in the same footsteps.
"I'm hoping to pull a Kirstie Alley. Every part of my body hurts... When I went in for a costume fitting, I've lost 8.5 inches. Three inches in my waist. Three in my hips. Over an inch in my thighs and another inch and a half on my arms. It's crazy," Lake explained to People.
"I have two sizes of Lucky Brand jeans: 8 and 6. Usually I wear the 8 because they are more comfortable but now even the 6 is too big. They used to be tight."
She has previously promised to remain conscious of her eating and workout habits while on the show in order to avoid "starving" herself.
Lake was recently injured during rehearsal for Dancing with the Stars and suffered a minor gash and a bruise on her leg.
Dancing with the Stars premieres tonight at 8/7c on ABC