I've been having the same problem ever since Betrock & Roll was added. I guess my devices are just too old to handle the update. Uninstalling & reinstalling did no good. Bummer.
Mine crashed a few times this morning (around 7am) and I noticed that there was an update for it in iTunes. I updated it and haven't had a problem since.
This happened to me also. I deleted and re-added the app numerous times and nothing. Just finally gave up.
I have had it happen twice, the last right before I went to vegas and I was going to get a ticket to a show. Sure glad I got another reward ahead of time.
Mine started crashing on my iPad a few days ago. I had planned to reload but just have not had the interest to mess with it now.