Harry Lillis "Bing" Crosby--"The Old Groaner"--The Bing Crosby Fan Page is another Crosby group on Facebook worth looking at. An ICC member Dave Richards often puts up lyrics from Crosby songs and challenges members of the group to name the song. It's one of those things that challenges you until you can remember what the answer is. Have a look at https://www.facebook.com/groups/320952361335214/966864130077364/?notif_t=group_activity
I can't log in as I'm not on Facebook.