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

Chely Wright

Age: 41

Occupation: Singer and Songwriter

Known For: Charting more than 15 singles on the country charts, writing songs for other artists such as Brad Paisley, Richard Marx, Indigo Girls, Mindy Smith, and Clay Walker, and being the first major country music performer to publicly admit she’s gay

Katy Perry

Age: 27

Occupation: Singer and Songwriter

Known For: Hit singles such as ‘I Kissed a Girl,’ ‘Hot n Cold,’ ‘California Gurls,’ ‘Teenage Dream,’ and ‘Firework,’ being the first female artist to get five songs on the Billboard Hot 100 in one year, her bizarre fashion sense, and her marriage to comedian Russell Brand

Marion Ross

Age: 83

Occupation: Actress

Known For: Playing Marion Cunningham, aka “Mrs. C,” on the sitcom ‘Happy Days’ from 1974 to 1984

Bobby Knight

Age: 71

Occupation: Retired College Basketball Coach

Known For: Winning more NCAA Division I men’s college basketball games than any other coach, his long stint as Indiana University’s coach, and his famously violent temper

Helen Reddy

Age: 70

Occupation: Singer

Known For: Fifteen Top 40 singles in the 1970s including ‘I Am Woman,’ ‘Delta Dawn,’ ‘You and Me Against the World,’ and ‘Angie Baby’