What do these people have in common?

Ashlee Simpson (singer)

Jessica Alba (actress)

Cathy Rigby (Olympian)

Christina Ricci (actress)

Audrey Hepburn (actress)

Alanis Morissette (singer)

Ashley Hamilton (actor)

Bethenny Frankel (celebrity)

Britney Spears (singer)

Demi Lovato (singer)

Elvis Presley (singer)

Geri Halliwell (Spice Girl)

Gretchen Rossi (Real Housewife)

Snooki (celebrity)

Billy Bob Thornton (actor)

Janet Jackson (singer)

Joan Rivers (comedian)

Kate Winslet (actress)

Lady Gaga (singer)

Mariah Carey (singer)

Daniel Johns (singer)

Oprah Winfrey (celebrity)

Princess Diana (Royalty)

Mary-Kate Olsen (actress)

Elton John (singer)

Kelly Clarkson (singer)

Nicole Richie (celebrity)

Victoria Beckham (Spice Girl)

Dennis Quaid (actor)

Whitney Houston (singer)

Kesha (singer)

Lindsay Lohan (actress)

Katharine McPhee (singer/actress)

Russell Brand (actor)