DNSMasq failed to start

I installed DNSMasq and added localhost to the listen-address in the conf file. However, when I try to start it, I get this:

Code:
brandon@ubuntu-server:~$ sudo /etc/init.d/dnsmasq start
 * Starting DNS forwarder and DHCP server dnsmasq
dnsmasq: failed to create listening socket: Address already in use
 * failed
                                                             [fail]