Avril Lavigne: Dinner with Ex-Husband Deryck Whibley!
The 27-year-old rocker filed for divorce from Deryck back in October of 2009.
Earlier that evening, Avril congratulated Deryck‘s group Sum41 on their Grammy nomination!
“CONGRATULATIONS @Sum41 for your Grammy nomination!!!!!!!!!! So fu**** cool. You guys deserve it!” Avril tweeted.