Rock Stars are fantastic when it comes to meet and greets (for the most part), they love their fans. They understand (for the most part) that their fans have gotten them where they are; they're the ones who buy the music, buy the concert tickets, and buy the meet and greets (if they can't win them).
They'll sign your skin:
They'll put their arm around you:
They will hug you with a smile:
But what about "Pop Stars"? Well, here are some pictures from some recent Avril Lavigne meet and greet where fans paid $400 to meet Avril, but had to stay "an arm's length away" from her: