Blame it on the WiFi. Apparently, that's what should be saying to all the fans who were that he didn’t participate in the singing portion of the cast’s virtual reunion on the Disney Family Singalong special that aired last week.In case you missed it, , , Corbin Bleu, and the rest of the East High Wildcats virtually reunited for the special and sang “We’re All in This Together.” Efron only appeared separately to introduce the song.