Ghosts? No.
UFO's piloted by extraterrestrials? No, but I'm almost sure there is intelligent life somewhere else in the universe.
Karma? The spiritual belief relating to reincarnation? No. The Western, non-spiritual belief that you get what you put out? More or less. (That is: if you're a jerk, don't expect people to be nice to you. Etc.)
Why do you believe there is intelligent life elsewhere in the universe?