Avril Lavigne took to Instagram on Tuesday to announce that she and Chad Kroeger are separating after two years of marriage. The couple tied the knot back in July 2013, and Avril acknowledged all the "unforgettable moments" they've shared throughout their relationship. "It is with heavy heart that Chad and I announce our separation today. Through not only the marriage, but the music as well, we've created many unforgettable moments," she said. The singer added, "We are still, and forever will be, the best of friends, and will always care deeply for each other. To all our family, friends and fans, thank you sincerely for the support."