I feel like a million dollars?

[Mordy]

English Language Tests, Intermediate level

ESL/EFL Test #348 "English Slang Idioms (69)", question 2

"After I got out of the spa, I felt like a million .........," Marcie said Shelly.

(a) pounds
(b) dollars
(c) people
(d) cents

English Language Tests, Intermediate level

ESL/EFL Test #348 "English Slang Idioms (69)", answer 2

"After I got out of the spa, I felt like a million dollars," Marcie said Shelly.

Correct answer: (b) dollars
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"After I got out of the spa, I felt like a billion.........," Marcie said Shelly.

[Our Tort System]

Nope, the accepted expression is "to feel like a million dollars" Otherwise it doesn't sound natural.
http://www.thefreedictionary.com/feel+like+a+million+dollars
The amount of money has no bearing here. After all, the expression is not about money, it conveyes the meaning of your happiness.
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