-Neither you nor Shara know "Motownphilly". Just because you know a smidgen more than Shara does not mean you should hop up and grab a mic. DO NOT EVER attempt it again. Even if there is no one there, like tonight.
-Similarly, don't sign up for songs you haven't listened to in years. There could be long instrumental breaks, awkward keys, or any number of disastrous things you aren't prepared for.
-You also don't know how "Midnight Train to Georgia" ends*. (Gladys and the Pips would be so sad) And talk-singing is only a good idea for William Shatner and Rex Harrison.
-You do know "Mercy".
-Next time sign up for "Shoop". (You KNOW that.) But not "The Shoop Shoop song" that is in a bad key for you.
*LONGEST ENDING EVER! And the karaoke screen had lyrics I've never, ever heard, and I've listened to that song lots and lots.