Look/feel like a million dollars/bucks
Definition 1 of 1
Pro Tip 1/3Positive Connotation
The phrase evokes a sense of great satisfaction or happiness with oneself or appearance. 
He got the promotion and now he feels like a million bucks!
Pro Tip 2/3Informal Usage
It’s casual and typically used in informal conversations or personal stories. 
You should've seen her at the party, she looked like a million dollars!
Pro Tip 3/3Hyperbole
This is an exaggerated expression, not meant to be taken literally. 
That massage made me feel like a million bucks, I can’t believe it!