More than 100 friends and relatives watched Avril Lavigne and Deryck Whibley exchange vows in the garden of a Mediterranean-style estate under a hydrangea-and rose-covered gazebo designed by Mark Held of L.A. florist Mark's Garden. The party then made its way through a willow-branch arbor for cocktails by a pond — complete with a pair of swans — where crystal chandeliers hung from the trees.