What a rock!
Christina Applegate is floating on a cloud after successfully kicking breast cancer’s ass a couple of years ago. The former Married With Children beauty is engaged to wed her rocker beau Martyn LeNoble after the hunk popped the question on Valentine’s Day.
Paps caught a snap of Applegate’s stunning diamond engagement ring as the actress jetted through Los Angeles International Airport on Saturday.
This will be the second marriage for both LeNoble and Christina: she divorced actor Johnathon Schaech in 2007.
No word on a wedding date. 
