COLUMBUS, Ohio -- Bruce Springsteen performed an acoustic set Sunday afternoon at the Ohio State University at a rally to support Sen. Barack Obama.

Springsteen encouraged Obama voters to register and take advantage of early voting. He also wanted to encourage those attending who have not registered to register before Monday's deadline.

In April, the singer endorsed the senator because Obama speaks to the America he envisioned in his music. "A country that's interested in its collective destiny and in the potential of its gathered spirit," he said.

The concert was free and open to the public.