This was a pretty nice romantic comedy.
Connor (Matthew McConaughey) is a notorious womanizer, and his ghost of an uncle turns up at the wedding of his brother to warn him about three girlfriend ghosts (past, present and future) so as to let him re-evaluate his jerkish behaviour (eg. breaking up via IM-conference) and re-connect with his first love, Jenny (Jennifer Garner).
Some parts were really funny, like this quote…
Jenny: If you do anything to distract from her wedding, I will sneak into your room in the middle of the night and cut off your favorite appendage.