My husband and I are big Lenny fans.......we have just booked tickets for the concert in Lisbon. We used Ticketmaster and went to their international site which took us to ticketline.pt.........tickets @ 35 euros each

.......significantly less than some of the other sites I looked at (one quoted £300 for two tickets!!)
True there is not much info on the venue but I saw some chat about it on this site.......seems the worst is that you may need to stand for the whole concert in a very hot Portuguese July............Lenny - you're worth it!!