Kristin Chenoweth
I saw her today for the second time. She is Danny Devito's busty, bubbly, bimbo blonde wife in the 2006 Xmas movie, "Deck the Halls". There is one scene where her tits are practically bouncing out of her top. I'd say DDs. Very nice cleavage.
The other movie, strangely is also an Xmas movie. 2008's "Four Christmases" with Vince Vaughn and Reese Witherspoon. She was Reese's character's sister, and again she was ROCKING some awesome Cleveland in a tight Xmas sweater.
On a side note, she's a classically trained singer and has a vocal range of over 4 octaves.