One of the more famous annulments happened in 2004 when Britney Spears got married in a small Las Vegas chapel and filed an annulment 55 hours later. What was her grounds for an annulment? How can one file for an annulment? Libertyville based family law attorney, Alan Lenczycki, discuss annulments in Illinois. Some of the reasons for annulments have a very short timeline to file.