Cappella

I'm going to be singing a cappella at a friend's wedding ceremony.

The show Glee is about an a cappella high school group that competes against other a cappella high school groups, but I promise, it's really quite entertaining.

The classified ad wanted female singers to form an a cappella group.

They're singing a cappella.

A cappella concerts are being held on campuses around the country, and many are sold out, packed tighter than sporting events.