The line commonly given as: "When im good,im very good. But, when im bad... I'm better." is actually played out like this:
Jack Clayton: You were wonderful tonight.
Tira: Yeah, I'm always wonderful at night.
Jack Clayton: Tonight, you were especially good.
Tira: Well... When I'm good, I'm very good. But, when I'm bad...
[winks at Jack]
Tira: I'm better.
The Film is "I'm No Angel" and you can read more about it here:
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