Christina Applegate has become a dance mom

She told PEOPLE.com: "Sometimes I'll find myself watching her in class, and I'm like, 'Oh my God, you're so being a dance mom. I'm sitting [there] in my head going, 'Why isn't she pointing her foot that way? Someone needs to go in there and fix her foot!' "

The 'Anchorman' star - who no longer dances herself due to injury - has always had a passion for the sport and always knew her daughter would take up ballet.

She explained: "It was my secret thing I did that nobody knew I did. I could go to classes and not have anyone bother me. And I did it for years up until I got pregnant with my daughter. I now have to live vicariously through my daughter. I watch her and help her speak through her body -- channel her emotions and her joy through her body.

[I help her] get grounded, get all that stuff out."

However, the blonde beauty admits she sometimes takes her passion too far.

She added: "I was stretching her [Sadie's] point today. I was like, 'Let me stretch your point a little bit, Sades. Not for any particular reason -- just giving you a little massage.' I tricked her!"