The actor said she was so surprised to be nominated for an award that she still can't think straight.
Usage notes: usually used in a negative way, as in the example
think straight
To think rationally or calmly. This phrase is often used in the negative to convey the opposite. Don't assign him anything else right now—he's so stressed about this case that he can't think straight.After working a 36-hour shift, I can't think straight and only want to climb into bed.
think straight
to think clearly. (Often negative.) I'm so tired I can't think straight.
ˈthink straight
think in a clear or logical way: You’re not thinking straight. If you leave your job, how will you support your family?