Here's a look at some notable birthdays being celebrated today:

Little Richard
Age: 80
Occupation: Singer, Songwriter and Musician
Known For: Helping define the dynamic sound of rock and roll in the 1950s with his frenetic piano playing and raspy, shouted vocals on classics like 'Tutti Frutti,' 'Long Tall Sally' and 'Good Golly, Miss Molly,' and creating a flamboyant style without which Prince might very well not exist

Margaret Cho
Age: 44
Occupation: Actress, Author and Comedian
Known For: Her stand-up routines that critique social and political problems pertaining to race and sexuality, winning awards for her humanitarian efforts on behalf of women, Asians and the LGBT community, and appearing on the TV show 'Drop Dead Diva'

Jim Messina
Age: 65
Occupation: Singer, Songwriter and Musician
Known For: Being a member of folk-rock group Buffalo Springfield, a founding member of country-rock group Poco, and half of the soft-rock duo Loggins and Messina

John Rzeznik
Age: 47
Occupation: Singer, Songwriter and Musician
Known For: Being the lead guitarist, frontman and primary songwriter of the rock band the Goo Goo Dolls, of which he is a founding member and with whom he has recorded nine studio albums and had hits such as 'Iris,' 'Name' and 'Slide'

Frankie Muniz
Age: 27
Occupation: Actor
Known For: Starring on the Fox sitcom 'Malcolm in the Middle,' and putting his acting career on hold in 2008 to try his hand as a race-car driver