Band punkrock asal Kanada, Sum 41 baru-baru ini mengabarkan jika mereka menghentikan aksinya di rangkaian Warped Tour 2011. Hal ini dipicu oleh sang vokalis Deryck Whibley yang mengalami cedera punggung ketika menjalani sebuah panggung di Boise beberapa waktu lalu. Nggak hanya Warped Tour saja, beberapa jadwal tur di Kanada pun terpaksa mereka tunda.
Berikut adalah pernyataan resmi dari band : "During yesterday's show in Boise, Deryck sustained another back injury and we have been forced to cancel the remaining Warped Tour dates and the Canadian run that was to follow. We hate canceling shows, but Deryck's well being is our top priority and the best thing right now is to give him time to heal. Thank you for your understanding. We wish Deryck a quick recovery and look forward to getting back out on the road."