CELEBRITY BIRTHDAYS (11/7/11): David Guetta 44 - French DJ and music producer who's been behind the recent hits "Sexy B****" and "Without You"

--Christopher Knight 54 - Peter on "The Brady Bunch". He would later become a reality TV star on "The Surreal Life" and "My Fair Brady". He and his skanky – albeit hot -- wife, former ‘America’s Top Model’ winner Adrianne Curry, whom he met on "The Surreal Life" are currently separated …

LISTEN: Here's a clip of the Brady Kids singing "Time to Change" from 'The Brady Bunch' episode in which Peter's voice starts to change...

--JONI MITCHELL 68 - One of the most important female recording artists of the rock era. Her biggest hits include "Big Yellow Taxi", "Help Me" and “Both Sides Now" and “Free Man In Paris" …

--Johnny Rivers 69 – Singer best known for his hits from the '60s and '70s. Rivers had nine Top 10 hits on the Billboard Hot 100 and 17 in the Top 40 from 1964 to 1977. His biggest included "Secret Agent Man", "Poor Side of Town", "Rockin' Pneumonia and the Boogie Woogie Flu", “Baby I Need Your Lovin”and "Swayin' to the Music (Slow Dancin')" …