If you don't hear your favorite Celtic Thunder song during today's concert, you can blame it on the thousands of fans who responded when the group asked for help in making up the set list for this latest tour. ''We’ve been touring since 2008,'' CT vocalist Ryan Kelly tells us in a pronounced Irish accent. ''We’ve made eight or nine albums, so we have a lot of material out there. As sort of a treat to our fans, we asked them what songs they wanted to hear us do. We took their requests and made sort of a greatest-hits-tour set list.'' Kelly, who is well known for his solo performances of ''Every Breath You Take'' and ''Black Is the Color'' during the multi-member group's stage shows, quickly adds, ''I do want to make it clear, often when you hear about a group doing a greatest hits tour, that's an indication that things are coming to an end, and that couldn't be further from the truth for us. We just spent several months putting together our next show.''