Am I the only one who is bugged by the fact that the past tense of lip-synch is lip-synched? Why isn't it lip-sanch? I don't know if you're actually asking, but it's because "lip-synch" was originally short for "lip-synchronize." It's not related to "sing."
Synchronize, lip-synch. Synchronized, lip-synched.
Nothing matters but knowing nothing matters. ~ Wicked
Everything in life is only for now. ~ Avenue Q
There is no future, there is no past. I live this moment as my last. ~ Rent
"He's a tramp, but I love him."