Kristin’s merry as sis in ‘Four Christmases’

t’s easy to see why Kristin Chenoweth was cast as Reese Witherspoon’s sister in “Four Christmases.” Kristin ChenowethKristin ChenowethChenoweth plays Courtney, the married mother who continues her sibling rivalry with Reese’s single, childless Kate. Courtney delights in telling Kate’s boyfriend (Vince Vaughn) about her reputation as Cootie Kate in grade school and about her sister’s fat