Answer: you

AnswerCrossword Clue
YOU"It's so ..!"
YOU"Hey, ..!"
YOU".. Are My Sunshine"
YOU".. think?"
YOUOne of us?
YOU"What's it to ..?"
YOU".. gotta be kidding!"
YOU"She Loves .."
YOUIt can be singular or plural
YOUThou, now
YOU"Are .. for real?"
YOU"... gotta be kidding!"
YOU".. Light Up My Life"
YOU".. first"
YOUSecond person?
YOU".. said it!"
YOU"... first!"
YOUUncle Sam poster word
YOUWord said while pointing
YOUOne of us
younow has YOUS, YOUSE in pl sense
YOU"Who, me?" Yeah, ..!"
YOU"... Are My Sunshine"
YOU"... must be kidding!"
YOULast word of the golden rule
YOUAVCX subscriber, presumably
YOUTime's 2006 Person of the Year
YOU"... wish!"
YOUPronoun
YOUThee, updated
YOUWarning, Part 1
YOUNot me
YOUWord after "Hey!"
YOUPart of WYSIWYG
YOUWord after "So it's" or "It's so"
YOUWho Uncle Sam wants, per the posters
YOUFirst word of "The Adventures of Huckleberry Finn"
YOUThee, nowadays
YOU"Is it really ...?"
YOU"More power to ...!"