The entire Catholic Church, here and in heaven is live people.
We have no examples of praying to saints in Heaven. The admonishment Paul was giving was to a local church to pray for each other.
Catholics have perverted this and now say they have to pray to Mary to hopefully get her to talk to Christ on our behalf. This is part of their justification for praying to Mary.....and please, don't say catholics don't pray to Mary.
There are too many examples in Catholicism that show they do.