Connie Francis, a pop star of the late 1950s and early 1960s known for hits such as 'Who's Sorry Now,' has died at 87 due to undisclosed causes.

Connie Francis, a pop singer and actress whose hits such as “Lipstick on Your Collar” and “Who’s Sorry Now?” became a soundtrack for a generation of teens in the 1960s, has died, according to a post from her publicist and friend,