cancer battle the former "90210" star has been getting support from celebrity friends including sarah michelle gellarand then there's her squad including husband kurt and her mom. shannen posted this video reminding us all that no matter what the challenge, you've got to keep dancing. >> you and your mom seem like you're so close. she's your best friend. >> thank god. thank god she's there. thank god we're so close, and we have such a good relationship, and i know it affects her, and i know that -- she's so strong. my mom is, you know, like, she's a steel magnolia. she's a southern girl. she'll force-feed me gatorade chips. >> what has the worst day been for you so far? >> i think the worst day was the confirmation that i had cancer. >> after my first treatment as i was in bed and i literally and i am so weak that i couldn't eat and couldn't drink, and my husband sat on the bed, and he was crying saying, please, please, you have to -- you can't sustain like this, shannen and that's when he picked me up and said i don't want to go to the doc and he picked me up and put me in the car. he's, like, you'r