Hate to break it to you but there is no way you can buy meet and greet passes. You have to have some sort of "connection" with someone who works at the venue they're playing at, or win them from the radio or some contest in order to get them. If you go to one of their concerts, you can try arriving EXTRA early and maybe be able to catch them by their tourbus or something. Sometimes, people wait hours after the show outside, to try and see if they'll an autograph signing or something before they leave. That's what a bunch of ppl did at the American Idol show I went to in August. I was lucky enough to get backstage passes from my aunts friend (aka my "connection") who works at the arena to meet them. Anyway, good luck! =D