“Eat like no one is watching. Or dance. Whatever”

The song “Come from the Heart” (1987) by Susanna Clark and Richard Leigh contains the lyrics:
 
“Sing like no one is listening.
Love like you’ve never been hurt.
Dance like nobody’s watching,
and live like it’s heaven on earth.”
 
“Eat like no one is watching. Or dance. Whatever” is a jocular variation that has been printed on many images. ““Eat like no one is watching, shop like the bill will never come” was cited in a 2003 newspaper. “Eat like no one is watching, dance like you’ve been drinking laugh like you just watched a fat man fall down a flight of stairs” was posted on Twitter on June 17, 2009.
 
“Eat like no one is watching, or dance. Whatever.” was posted on Twitter on April 21, 2013.
 
“Eat like no one is going to see you naked” is a similar saying.
     
   
6 October 2003, The Courier-Journal (Louisville, KY), “Ladybug boutique makes room for more gifts,” pg. F1:
Last week, Bollinger was sitting curled up in the front of the store on a green couch with colored fringe lining. Pillows with embroidered messages like, “There’s so little difference between husbands, you might as well keep the first one,” and, “Eat like no one is watching, shop like the bill will never come,” lined the couch around her. She sported a jean jacket, similar to the ones on the back wall, over a red T-shirt and black capri pants.
 
Fox News
November 22, 2007
Happy Thanksgiving!
Janice Dean | Meteorologist
(...)
Have a wonderful Thanksgiving.  Eat like nobody’s watching!  (I always do… HAHA!)
   
Google Books
Don’t Touch
By Elise VanCise
Lulu Press (Lulu.com)
2008
Pg. 83:
A sign on the wall over the kitchen window read. “Eat like nobody’s watching.”
 
Twitter
Christie White
‏@ChrisC349
“eat like no one is watching, and shop like the bill will never come!”
4:40 PM - 28 May 2009
 
YouTube
Kathy Mattea - Come From The Heart
KathyMatteaVEVO
Uploaded on Jun 16, 2009
Music video by Kathy Mattea performing Come From The Heart. (C) 1990 Mercury Records
 
Twitter
Shwanzy
‏@LaShwanz
eat like no one is watching, dance like you’ve been drinking laugh like you just watched a fat man fall down a flight of stairs
7:55 PM - 17 Jun 2009
 
Twitter
😊
‏@Kezthro
Dance Like No One Is watching
Sing Like Nobody Is Listening      
my version=
Eat Like No One Is Watching
Fart Like No One Is Sniffing
4:23 PM - 2 Aug 2012
 
Twitter
Lexi Rae Seller
‏@LexiRaeSeller12
Eat like no one is watching, or dance. Whatever.
6:58 PM - 21 Apr 2013
 
Twitter
jennie karges
‏@jennieKargespho
Eat like no one is watching. 
..... or dance….. whatever.
3:19 PM - 15 Aug 2013
 
Tablespoon
20 Decadent Desserts to Eat Like Nobody’s Watching
By Burn The Wine
January 17, 2015