"Get over it" versus "Get it over with"

[Tom]

Hi

Could you please tell me the difference between the following?

1-"Get over it"
2-"Get it over with"

Tom

[Yankee]

Hi Tom

http://dictionary.reference.com/browse/get%20over (scroll down to defintion 47)

http://dictionary.reference.com/browse/over%20with (scroll down to "over with")

Amy
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"Nearly all men can stand adversity, but if you want to test a man's character, give him power." ~ Abraham Lincoln