Kelly and I try to decide what is the greatest pop song ever. Now keep in mind we had to only select 16 songs for the bracket and work from there. It was a hard one to figure out but see if you agree with us. #pop #nsync, #backstreetboys #taylorswift #outkast #cyndilauper #michaeljackson #britneyspears #spicegirls #justintimberlake #kellyclarkson #rickymartin