The beginning moments this Ariana Grande guest appearance on Jimmy Kimmel Live! captures a fantastic example of a microexpression of fear superimposed over a subtle expression of fear.
At 0:12, Jimmy Kimmel continues: "... but you put such a dark -"
Ariana Grande: "Yeah."
Kimmel: "...almost blood-purply colored on your lips"
Kimmel: "... with the bright red suite."
Grande: "It's a lot, but I think it's appropriate."
Kimmel: "It's fabulous."
Microexpression of Fear (above) just as Kimmel says, "... blood purply colored ...". Note her mouth corners pulled back (very brief) and Ariana's eyes opened wider than baseline
In this second image we see another microexpression just before Kimmel says, "... lips ...". This is virtually identical to the example above, except that Ms. Grande's eyes are not opened quite as much (though still wider than her baseline).
The microexpression component is seen with the corners of her mouth pulling backwards twice (it may look like a miniature smile to some) - however it's very short-lived (please watch the video on normal speed and then on half speed to best appreciate this). Superimposed on this evanescent mouth nonverbal - we can see the longer duration change of Ariana's slightly widely opened eyes.
Grande is fearful that her lipstick wasn't the right color.
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