Sugar Bears prefer blondes.

On Sunday night's "Here Comes Honey Boo Boo" Halloween special, Mama June got herself a major makeover -- and turned into Marilyn Monroe!

The family matriarch straightened and colored her hair just in time for the October holiday, where she tried on Monroe's "Seven Year Itch" dress as one of her potential costumes.

Check out the video above to see her tanning fiasco ... and find out why the outfit had Mike "Sugar Bear" Thompson feeling more like "Horny Bear."

His words, not ours.

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