Published on: January 9, 2004

Britney Spears' spur-of-the moment wedding resulted from a secret dating relationship she kept under wraps by quietly seeing her beau when she went back home.

While reports have called the Las Vegas wedding a booze-filled "joke that went too far," The ENQUIRER has learned that Britney and her groom Jason Alexander were sober while tying the knot -- and Britney even cried tears of joy during the ceremony.

The issue that goes on sale Friday details the couple's wild weekend in Vegas, reveals Jason's violent past ... and much more.